diff --git a/src/test/log_test_helpers.c b/src/test/log_test_helpers.c
index 51b5f9b7b1..bcf73a8437 100644
--- a/src/test/log_test_helpers.c
+++ b/src/test/log_test_helpers.c
@@ -35,54 +35,56 @@ mock_clean_saved_logs(void)
   saved_logs = NULL;
 }
 
-static mock_saved_log_entry_t *
-mock_get_log_entry(int ix)
-{
-  int saved_log_count = mock_saved_log_number();
-  if (ix < 0) {
-    ix = saved_log_count + ix;
-  }
-
-  if (saved_log_count <= ix)
-    return NULL;
-
-  return smartlist_get(saved_logs, ix);
-}
-
-const char *
-mock_saved_log_at(int ix)
-{
-  mock_saved_log_entry_t *ent = mock_get_log_entry(ix);
-  if (ent)
-    return ent->generated_msg;
-  else
-    return "";
-}
-
-int
-mock_saved_severity_at(int ix)
-{
-  mock_saved_log_entry_t *ent = mock_get_log_entry(ix);
-  if (ent)
-    return ent->severity;
-  else
-    return -1;
-}
-
-int
-mock_saved_log_number(void)
-{
-  if (!saved_logs)
-    return 0;
-  return smartlist_len(saved_logs);
-}
-
 const smartlist_t *
 mock_saved_logs(void)
 {
   return saved_logs;
 }
 
+int
+mock_saved_log_has_message(const char *msg)
+{
+  int has_msg = 0;
+  if (saved_logs) {
+    SMARTLIST_FOREACH(saved_logs, mock_saved_log_entry_t *, m,
+                      {
+                        if (msg && m->generated_msg &&
+                            !strcmp(msg, m->generated_msg)) {
+                          has_msg = 1;
+                        }
+                      });
+  }
+
+  return has_msg;
+}
+
+/* Do the saved logs have any messages with severity? */
+int
+mock_saved_log_has_severity(int severity)
+{
+  int has_sev = 0;
+  if (saved_logs) {
+    SMARTLIST_FOREACH(saved_logs, mock_saved_log_entry_t *, m,
+                      {
+                        if (m->severity == severity) {
+                          has_sev = 1;
+                        }
+                      });
+  }
+
+  return has_sev;
+}
+
+/* Do the saved logs have any messages? */
+int
+mock_saved_log_has_entry(void)
+{
+  if (saved_logs) {
+    return smartlist_len(saved_logs) > 0;
+  }
+  return 0;
+}
+
 void
 mock_saving_logv(int severity, log_domain_mask_t domain,
                  const char *funcname, const char *suffix,
diff --git a/src/test/log_test_helpers.h b/src/test/log_test_helpers.h
index af8e8a60e7..298237dddb 100644
--- a/src/test/log_test_helpers.h
+++ b/src/test/log_test_helpers.h
@@ -23,9 +23,33 @@ void mock_clean_saved_logs(void);
 const smartlist_t *mock_saved_logs(void);
 int setup_capture_of_logs(int new_level);
 void teardown_capture_of_logs(int prev);
-const char *mock_saved_log_at(int ix);
-int mock_saved_severity_at(int ix);
-int mock_saved_log_number(void);
+int mock_saved_log_has_message(const char *msg);
+int mock_saved_log_has_severity(int severity);
+int mock_saved_log_has_entry(void);
+
+#define expect_log_msg(str) \
+  tt_assert_msg(mock_saved_log_has_message(str), \
+                "expected log to contain " # str);
+
+#define expect_no_log_msg(str) \
+  tt_assert_msg(!mock_saved_log_has_message(str), \
+                "expected log to not contain " # str);
+
+#define expect_log_severity(severity) \
+  tt_assert_msg(mock_saved_log_has_severity(severity), \
+                "expected log to contain severity " # severity);
+
+#define expect_no_log_severity(severity) \
+  tt_assert_msg(!mock_saved_log_has_severity(severity), \
+                "expected log to not contain severity " # severity);
+
+#define expect_log_entry() \
+  tt_assert_msg(mock_saved_log_has_entry(), \
+                "expected log to contain entries");
+
+#define expect_no_log_entry() \
+  tt_assert_msg(!mock_saved_log_has_entry(), \
+                "expected log to not contain entries");
 
 #endif
 
diff --git a/src/test/test_compat_libevent.c b/src/test/test_compat_libevent.c
index 96502df308..f3fe113012 100644
--- a/src/test/test_compat_libevent.c
+++ b/src/test/test_compat_libevent.c
@@ -30,38 +30,28 @@ test_compat_libevent_logging_callback(void *ignored)
   int previous_log = setup_capture_of_logs(LOG_DEBUG);
 
   libevent_logging_callback(_EVENT_LOG_DEBUG, "hello world");
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  tt_str_op(mock_saved_log_at(0), OP_EQ,
-            "Message from libevent: hello world\n");
-  tt_int_op(mock_saved_severity_at(0), OP_EQ, LOG_DEBUG);
+  expect_log_msg("Message from libevent: hello world\n");
+  expect_log_severity(LOG_DEBUG);
 
   mock_clean_saved_logs();
   libevent_logging_callback(_EVENT_LOG_MSG, "hello world another time");
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  tt_str_op(mock_saved_log_at(0), OP_EQ,
-            "Message from libevent: hello world another time\n");
-  tt_int_op(mock_saved_severity_at(0), OP_EQ, LOG_INFO);
+  expect_log_msg("Message from libevent: hello world another time\n");
+  expect_log_severity(LOG_INFO);
 
   mock_clean_saved_logs();
   libevent_logging_callback(_EVENT_LOG_WARN, "hello world a third time");
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  tt_str_op(mock_saved_log_at(0), OP_EQ,
-            "Warning from libevent: hello world a third time\n");
-  tt_int_op(mock_saved_severity_at(0), OP_EQ, LOG_WARN);
+  expect_log_msg("Warning from libevent: hello world a third time\n");
+  expect_log_severity(LOG_WARN);
 
   mock_clean_saved_logs();
   libevent_logging_callback(_EVENT_LOG_ERR, "hello world a fourth time");
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  tt_str_op(mock_saved_log_at(0), OP_EQ,
-            "Error from libevent: hello world a fourth time\n");
-  tt_int_op(mock_saved_severity_at(0), OP_EQ, LOG_ERR);
+  expect_log_msg("Error from libevent: hello world a fourth time\n");
+  expect_log_severity(LOG_ERR);
 
   mock_clean_saved_logs();
   libevent_logging_callback(42, "hello world a fifth time");
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  tt_str_op(mock_saved_log_at(0), OP_EQ,
-            "Message [42] from libevent: hello world a fifth time\n");
-  tt_int_op(mock_saved_severity_at(0), OP_EQ, LOG_WARN);
+  expect_log_msg("Message [42] from libevent: hello world a fifth time\n");
+  expect_log_severity(LOG_WARN);
 
   mock_clean_saved_logs();
   libevent_logging_callback(_EVENT_LOG_DEBUG,
@@ -78,8 +68,7 @@ test_compat_libevent_logging_callback(void *ignored)
                             "012345678901234567890123456789"
                             "012345678901234567890123456789"
                             );
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  tt_str_op(mock_saved_log_at(0), OP_EQ, "Message from libevent: "
+  expect_log_msg("Message from libevent: "
                             "012345678901234567890123456789"
                             "012345678901234567890123456789"
                             "012345678901234567890123456789"
@@ -92,25 +81,22 @@ test_compat_libevent_logging_callback(void *ignored)
                             "012345678901234567890123456789"
                             "012345678901234567890123456789"
             "012345678901234567890123456789\n");
-  tt_int_op(mock_saved_severity_at(0), OP_EQ, LOG_DEBUG);
+  expect_log_severity(LOG_DEBUG);
 
   mock_clean_saved_logs();
   libevent_logging_callback(42, "xxx\n");
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  tt_str_op(mock_saved_log_at(0), OP_EQ, "Message [42] from libevent: xxx\n");
-  tt_int_op(mock_saved_severity_at(0), OP_EQ, LOG_WARN);
+  expect_log_msg("Message [42] from libevent: xxx\n");
+  expect_log_severity(LOG_WARN);
 
   suppress_libevent_log_msg("something");
   mock_clean_saved_logs();
   libevent_logging_callback(_EVENT_LOG_MSG, "hello there");
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  tt_str_op(mock_saved_log_at(0), OP_EQ,
-            "Message from libevent: hello there\n");
-  tt_int_op(mock_saved_severity_at(0), OP_EQ, LOG_INFO);
+  expect_log_msg("Message from libevent: hello there\n");
+  expect_log_severity(LOG_INFO);
 
   mock_clean_saved_logs();
   libevent_logging_callback(_EVENT_LOG_MSG, "hello there something else");
-  tt_int_op(mock_saved_log_number(), OP_EQ, 0);
+  expect_no_log_msg("hello there something else");
 
   // No way of verifying the result of this, it seems =/
   configure_libevent_logging();
diff --git a/src/test/test_options.c b/src/test/test_options.c
index 4bae065925..2d48cd17f5 100644
--- a/src/test/test_options.c
+++ b/src/test/test_options.c
@@ -338,22 +338,47 @@ typedef struct {
   or_options_t *def_opt;
 } options_test_data_t;
 
+static void free_options_test_data(options_test_data_t *td);
+
 static options_test_data_t *
 get_options_test_data(const char *conf)
 {
+  int rv = -1;
+  char *msg = NULL;
   config_line_t *cl=NULL;
   options_test_data_t *result = tor_malloc(sizeof(options_test_data_t));
   result->opt = options_new();
   result->old_opt = options_new();
   result->def_opt = options_new();
-  config_get_lines(conf, &cl, 1);
-  config_assign(&options_format, result->opt, cl, 0, 0, NULL);
+  rv = config_get_lines(conf, &cl, 1);
+  tt_assert(rv == 0);
+  rv = config_assign(&options_format, result->opt, cl, 0, 0, &msg);
+  if (msg) {
+    /* Display the parse error message by comparing it with an empty string */
+    tt_str_op(msg, OP_EQ, "");
+  }
+  tt_assert(rv == 0);
   config_free_lines(cl);
   result->opt->LogTimeGranularity = 1;
   result->opt->TokenBucketRefillInterval = 1;
-  config_get_lines(TEST_OPTIONS_OLD_VALUES, &cl, 1);
-  config_assign(&options_format, result->def_opt, cl, 0, 0, NULL);
+  rv = config_get_lines(TEST_OPTIONS_OLD_VALUES, &cl, 1);
+  tt_assert(rv == 0);
+  rv = config_assign(&options_format, result->def_opt, cl, 0, 0, &msg);
+  if (msg) {
+    /* Display the parse error message by comparing it with an empty string */
+    tt_str_op(msg, OP_EQ, "");
+  }
+  tt_assert(rv == 0);
+
+done:
   config_free_lines(cl);
+  if (rv != 0) {
+    free_options_test_data(result);
+    result = NULL;
+    /* Callers expect a non-NULL result, so just die if we can't provide one.
+     */
+    tor_assert(0);
+  }
   return result;
 }
 
@@ -379,7 +404,7 @@ test_options_validate__uname_for_server(void *ignored)
   MOCK(get_uname, fixed_get_uname);
   fixed_get_uname_result = "Windows 95";
   options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
-  tt_str_op(mock_saved_log_at(0), OP_EQ, "Tor is running as a server, but you"
+  expect_log_msg("Tor is running as a server, but you"
            " are running Windows 95; this probably won't work. See https://www"
            ".torproject.org/docs/faq.html#BestOSForRelay for details.\n");
   tor_free(msg);
@@ -387,7 +412,7 @@ test_options_validate__uname_for_server(void *ignored)
   fixed_get_uname_result = "Windows 98";
   mock_clean_saved_logs();
   options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
-  tt_str_op(mock_saved_log_at(0), OP_EQ, "Tor is running as a server, but you"
+  expect_log_msg("Tor is running as a server, but you"
            " are running Windows 98; this probably won't work. See https://www"
            ".torproject.org/docs/faq.html#BestOSForRelay for details.\n");
   tor_free(msg);
@@ -395,7 +420,7 @@ test_options_validate__uname_for_server(void *ignored)
   fixed_get_uname_result = "Windows Me";
   mock_clean_saved_logs();
   options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
-  tt_str_op(mock_saved_log_at(0), OP_EQ, "Tor is running as a server, but you"
+  expect_log_msg("Tor is running as a server, but you"
            " are running Windows Me; this probably won't work. See https://www"
            ".torproject.org/docs/faq.html#BestOSForRelay for details.\n");
   tor_free(msg);
@@ -403,7 +428,7 @@ test_options_validate__uname_for_server(void *ignored)
   fixed_get_uname_result = "Windows 2000";
   mock_clean_saved_logs();
   options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
+  expect_log_entry();
   tor_free(msg);
 
  done:
@@ -512,7 +537,7 @@ test_options_validate__contactinfo(void *ignored)
 
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, -1);
-  tt_str_op(mock_saved_log_at(0), OP_EQ,
+  expect_log_msg(
             "Your ContactInfo config option is not"
             " set. Please consider setting it, so we can contact you if your"
             " server is misconfigured or something else goes wrong.\n");
@@ -524,7 +549,7 @@ test_options_validate__contactinfo(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, -1);
-  tt_str_op(mock_saved_log_at(0), OP_NE,
+  expect_no_log_msg(
             "Your ContactInfo config option is not"
             " set. Please consider setting it, so we can contact you if your"
             " server is misconfigured or something else goes wrong.\n");
@@ -632,7 +657,7 @@ test_options_validate__authdir(void *ignored)
   tt_int_op(ret, OP_EQ, -1);
   tt_str_op(msg, OP_EQ, "Failed to resolve/guess local address. See logs for"
             " details.");
-  tt_str_op(mock_saved_log_at(0), OP_EQ, "Could not resolve local Address "
+  expect_log_msg("Could not resolve local Address "
             "'this.should.not_exist.example.org'. Failing.\n");
   tor_free(msg);
 
@@ -763,7 +788,7 @@ test_options_validate__authdir(void *ignored)
                                 "SchedulerLowWaterMark__ 10\n");
   mock_clean_saved_logs();
   options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
-  tt_str_op(mock_saved_log_at(0), OP_EQ, "Authoritative directory servers "
+  expect_log_msg("Authoritative directory servers "
             "can't set UseEntryGuards. Disabling.\n");
   tt_int_op(tdata->opt->UseEntryGuards, OP_EQ, 0);
   tor_free(msg);
@@ -777,7 +802,7 @@ test_options_validate__authdir(void *ignored)
                                 "SchedulerLowWaterMark__ 10\n");
   mock_clean_saved_logs();
   options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
-  tt_str_op(mock_saved_log_at(0), OP_EQ, "Authoritative directories always try"
+  expect_log_msg("Authoritative directories always try"
             " to download extra-info documents. Setting DownloadExtraInfo.\n");
   tt_int_op(tdata->opt->DownloadExtraInfo, OP_EQ, 1);
   tor_free(msg);
@@ -792,7 +817,7 @@ test_options_validate__authdir(void *ignored)
                                 "SchedulerLowWaterMark__ 10\n");
   mock_clean_saved_logs();
   options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
-  tt_str_op(mock_saved_log_at(0), OP_NE, "Authoritative directories always try"
+  expect_no_log_msg("Authoritative directories always try"
             " to download extra-info documents. Setting DownloadExtraInfo.\n");
   tt_int_op(tdata->opt->DownloadExtraInfo, OP_EQ, 1);
   tor_free(msg);
@@ -935,7 +960,7 @@ test_options_validate__relay_with_hidden_services(void *ignored)
                                                      );
 
   options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
-  tt_str_op(mock_saved_log_at(1), OP_EQ,
+  expect_log_msg(
             "Tor is currently configured as a relay and a hidden service. "
             "That's not very secure: you should probably run your hidden servi"
             "ce in a separate Tor process, at least -- see "
@@ -959,9 +984,9 @@ test_options_validate__relay_with_hidden_services(void *ignored)
 /*   options_test_data_t *tdata = get_options_test_data(""); */
 /*   ret = options_validate(tdata->old_opt, tdata->opt, */
 /*                          tdata->def_opt, 0, &msg); */
-/*   tt_str_op(mock_saved_log_at(0), OP_EQ, */
-/*           "SocksPort, TransPort, NATDPort, DNSPort, and ORPort are all " */
-/*           "undefined, and there aren't any hidden services configured. " */
+/*   expect_log_msg("SocksPort, TransPort, NATDPort, DNSPort, and ORPort " */
+/*           "are all undefined, and there aren't any hidden services " */
+/*           "configured. " */
 /*           " Tor will still run, but probably won't do anything.\n"); */
 /*  done: */
 /*   teardown_capture_of_logs(previous_log); */
@@ -1145,7 +1170,7 @@ test_options_validate__exclude_nodes(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, -1);
-  tt_str_op(mock_saved_log_at(0), OP_EQ,
+  expect_log_msg(
             "You have asked to exclude certain relays from all positions "
             "in your circuits. Expect hidden services and other Tor "
             "features to be broken in unpredictable ways.\n");
@@ -1158,7 +1183,7 @@ test_options_validate__exclude_nodes(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, -1);
-  tt_str_op(mock_saved_log_at(0), OP_NE,
+  expect_no_log_msg(
             "You have asked to exclude certain relays from all positions "
             "in your circuits. Expect hidden services and other Tor "
             "features to be broken in unpredictable ways.\n");
@@ -1183,8 +1208,7 @@ test_options_validate__scheduler(void *ignored)
 
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, -1);
-  tt_str_op(mock_saved_log_at(0), OP_EQ,
-            "Bad SchedulerLowWaterMark__ option\n");
+  expect_log_msg("Bad SchedulerLowWaterMark__ option\n");
   tor_free(msg);
 
   // TODO: this test cannot run on platforms where UINT32_MAX == UINT64_MAX.
@@ -1198,8 +1222,7 @@ test_options_validate__scheduler(void *ignored)
   /* ret = options_validate(tdata->old_opt, tdata->opt, */
   /*                        tdata->def_opt, 0, &msg); */
   /* tt_int_op(ret, OP_EQ, -1); */
-  /* tt_str_op(mock_saved_log_at(1), OP_EQ, */
-  /*           "Bad SchedulerLowWaterMark__ option\n"); */
+  /* expect_log_msg("Bad SchedulerLowWaterMark__ option\n"); */
 
   free_options_test_data(tdata);
   tdata = get_options_test_data("SchedulerLowWaterMark__ 42\n"
@@ -1207,8 +1230,7 @@ test_options_validate__scheduler(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, -1);
-  tt_str_op(mock_saved_log_at(0), OP_EQ,
-            "Bad SchedulerHighWaterMark option\n");
+  expect_log_msg("Bad SchedulerHighWaterMark option\n");
   tor_free(msg);
 
  done:
@@ -1283,8 +1305,7 @@ test_options_validate__tlsec(void *ignored)
 
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, -1);
-  tt_str_op(mock_saved_log_at(0), OP_EQ,
-            "Unrecognized TLSECGroup: Falling back to the default.\n");
+  expect_log_msg("Unrecognized TLSECGroup: Falling back to the default.\n");
   tt_assert(!tdata->opt->TLSECGroup);
   tor_free(msg);
 
@@ -1295,7 +1316,7 @@ test_options_validate__tlsec(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, -1);
-  tt_str_op(mock_saved_log_at(0), OP_NE,
+  expect_no_log_msg(
             "Unrecognized TLSECGroup: Falling back to the default.\n");
   tt_assert(tdata->opt->TLSECGroup);
   tor_free(msg);
@@ -1307,7 +1328,7 @@ test_options_validate__tlsec(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, -1);
-  tt_str_op(mock_saved_log_at(0), OP_NE,
+  expect_no_log_msg(
             "Unrecognized TLSECGroup: Falling back to the default.\n");
   tt_assert(tdata->opt->TLSECGroup);
   tor_free(msg);
@@ -1360,8 +1381,7 @@ test_options_validate__recommended_packages(void *ignored)
 
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, -1);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  tt_str_op(mock_saved_log_at(0), OP_NE, "Invalid RecommendedPackage line "
+  expect_no_log_msg("Invalid RecommendedPackage line "
             "invalid-package-line will be ignored\n");
 
  done:
@@ -1455,9 +1475,7 @@ test_options_validate__paths_needed(void *ignored)
   tt_int_op(ret, OP_EQ, -1);
   tt_assert(tdata->opt->PathsNeededToBuildCircuits > 0.24 &&
             tdata->opt->PathsNeededToBuildCircuits < 0.26);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  tt_str_op(mock_saved_log_at(0), OP_EQ,
-            "PathsNeededToBuildCircuits is too low. Increasing to 0.25\n");
+  expect_log_msg("PathsNeededToBuildCircuits is too low. Increasing to 0.25\n");
   tor_free(msg);
 
   free_options_test_data(tdata);
@@ -1471,8 +1489,7 @@ test_options_validate__paths_needed(void *ignored)
   tt_int_op(ret, OP_EQ, -1);
   tt_assert(tdata->opt->PathsNeededToBuildCircuits > 0.94 &&
             tdata->opt->PathsNeededToBuildCircuits < 0.96);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  tt_str_op(mock_saved_log_at(0), OP_EQ, "PathsNeededToBuildCircuits is "
+  expect_log_msg("PathsNeededToBuildCircuits is "
             "too high. Decreasing to 0.95\n");
   tor_free(msg);
 
@@ -1487,7 +1504,7 @@ test_options_validate__paths_needed(void *ignored)
   tt_int_op(ret, OP_EQ, -1);
   tt_assert(tdata->opt->PathsNeededToBuildCircuits > 0.90 &&
             tdata->opt->PathsNeededToBuildCircuits < 0.92);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 0);
+  expect_no_log_entry();
   tor_free(msg);
 
  done:
@@ -1638,11 +1655,10 @@ test_options_validate__reachable_addresses(void *ignored)
 
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, -1);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 6);
-  tt_str_op(mock_saved_log_at(1), OP_EQ, "Converting FascistFirewall config "
+  expect_log_msg("Converting FascistFirewall config "
             "option to new format: \"ReachableDirAddresses *:80\"\n");
   tt_str_op(tdata->opt->ReachableDirAddresses->value, OP_EQ, "*:80");
-  tt_str_op(mock_saved_log_at(2), OP_EQ, "Converting FascistFirewall config "
+  expect_log_msg("Converting FascistFirewall config "
             "option to new format: \"ReachableORAddresses *:443\"\n");
   tt_str_op(tdata->opt->ReachableORAddresses->value, OP_EQ, "*:443");
   tor_free(msg);
@@ -1659,7 +1675,7 @@ test_options_validate__reachable_addresses(void *ignored)
   tdata->opt->FirewallPorts = smartlist_new();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, -1);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 4);
+  expect_log_entry();
   tt_str_op(tdata->opt->ReachableDirAddresses->value, OP_EQ, "*:81");
   tt_str_op(tdata->opt->ReachableORAddresses->value, OP_EQ, "*:444");
   tor_free(msg);
@@ -1675,8 +1691,7 @@ test_options_validate__reachable_addresses(void *ignored)
 
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, -1);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 5);
-  tt_str_op(mock_saved_log_at(1), OP_EQ, "Converting FascistFirewall and "
+  expect_log_msg("Converting FascistFirewall and "
             "FirewallPorts config options to new format: "
             "\"ReachableAddresses *:123\"\n");
   tt_str_op(tdata->opt->ReachableAddresses->value, OP_EQ, "*:123");
@@ -1695,7 +1710,7 @@ test_options_validate__reachable_addresses(void *ignored)
 
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, -1);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 4);
+  expect_log_entry();
   tt_str_op(tdata->opt->ReachableAddresses->value, OP_EQ, "*:82");
   tor_free(msg);
 
@@ -2056,7 +2071,7 @@ test_options_validate__publish_server_descriptor(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, -1);
-  tt_str_op(mock_saved_log_at(1), OP_EQ, "Can't set a DirPort on a bridge "
+  expect_log_msg("Can't set a DirPort on a bridge "
             "relay; disabling DirPort\n");
   tt_assert(!tdata->opt->DirPort_lines);
   tt_assert(!tdata->opt->DirPort_set);
@@ -2158,7 +2173,7 @@ test_options_validate__hidserv(void *ignored)
   tdata->opt->MinUptimeHidServDirectoryV2 = -1;
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(1), OP_EQ, "MinUptimeHidServDirectoryV2 "
+  expect_log_msg("MinUptimeHidServDirectoryV2 "
             "option must be at least 0 seconds. Changing to 0.\n");
   tt_int_op(tdata->opt->MinUptimeHidServDirectoryV2, OP_EQ, 0);
   tor_free(msg);
@@ -2169,7 +2184,7 @@ test_options_validate__hidserv(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(1), OP_EQ, "RendPostPeriod option is too short;"
+  expect_log_msg("RendPostPeriod option is too short;"
             " raising to 600 seconds.\n");
   tt_int_op(tdata->opt->RendPostPeriod, OP_EQ, 600);
   tor_free(msg);
@@ -2180,7 +2195,7 @@ test_options_validate__hidserv(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(1), OP_EQ, "RendPostPeriod is too large; "
+  expect_log_msg("RendPostPeriod is too large; "
             "clipping to 302400s.\n");
   tt_int_op(tdata->opt->RendPostPeriod, OP_EQ, 302400);
   tor_free(msg);
@@ -2206,7 +2221,7 @@ test_options_validate__predicted_ports(void *ignored)
                                      TEST_OPTIONS_DEFAULT_VALUES);
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(1), OP_EQ, "PredictedPortsRelevanceTime is too "
+  expect_log_msg("PredictedPortsRelevanceTime is too "
             "large; clipping to 3600s.\n");
   tt_int_op(tdata->opt->PredictedPortsRelevanceTime, OP_EQ, 3600);
 
@@ -2433,7 +2448,7 @@ test_options_validate__circuits(void *ignored)
   tdata = get_options_test_data(TEST_OPTIONS_DEFAULT_VALUES
                                 "MaxCircuitDirtiness 2592001\n");
   options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
-  tt_str_op(mock_saved_log_at(1), OP_EQ, "MaxCircuitDirtiness option is too "
+  expect_log_msg("MaxCircuitDirtiness option is too "
             "high; setting to 30 days.\n");
   tt_int_op(tdata->opt->MaxCircuitDirtiness, OP_EQ, 2592000);
   tor_free(msg);
@@ -2443,7 +2458,7 @@ test_options_validate__circuits(void *ignored)
   tdata = get_options_test_data(TEST_OPTIONS_DEFAULT_VALUES
                                 "CircuitStreamTimeout 1\n");
   options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
-  tt_str_op(mock_saved_log_at(2), OP_EQ, "CircuitStreamTimeout option is too"
+  expect_log_msg("CircuitStreamTimeout option is too"
             " short; raising to 10 seconds.\n");
   tt_int_op(tdata->opt->CircuitStreamTimeout, OP_EQ, 10);
   tor_free(msg);
@@ -2453,7 +2468,7 @@ test_options_validate__circuits(void *ignored)
   tdata = get_options_test_data(TEST_OPTIONS_DEFAULT_VALUES
                                 "CircuitStreamTimeout 111\n");
   options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
-  tt_str_op(mock_saved_log_at(2), OP_NE, "CircuitStreamTimeout option is too"
+  expect_no_log_msg("CircuitStreamTimeout option is too"
             " short; raising to 10 seconds.\n");
   tt_int_op(tdata->opt->CircuitStreamTimeout, OP_EQ, 111);
   tor_free(msg);
@@ -2463,7 +2478,7 @@ test_options_validate__circuits(void *ignored)
   tdata = get_options_test_data(TEST_OPTIONS_DEFAULT_VALUES
                                 "HeartbeatPeriod 1\n");
   options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
-  tt_str_op(mock_saved_log_at(2), OP_EQ, "HeartbeatPeriod option is too short;"
+  expect_log_msg("HeartbeatPeriod option is too short;"
             " raising to 1800 seconds.\n");
   tt_int_op(tdata->opt->HeartbeatPeriod, OP_EQ, 1800);
   tor_free(msg);
@@ -2473,7 +2488,7 @@ test_options_validate__circuits(void *ignored)
   tdata = get_options_test_data(TEST_OPTIONS_DEFAULT_VALUES
                                 "HeartbeatPeriod 1982\n");
   options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
-  tt_str_op(mock_saved_log_at(2), OP_NE, "HeartbeatPeriod option is too short;"
+  expect_no_log_msg("HeartbeatPeriod option is too short;"
             " raising to 1800 seconds.\n");
   tt_int_op(tdata->opt->HeartbeatPeriod, OP_EQ, 1982);
   tor_free(msg);
@@ -2484,7 +2499,7 @@ test_options_validate__circuits(void *ignored)
                                 "CircuitBuildTimeout 1\n"
                                 );
   options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
-  tt_str_op(mock_saved_log_at(1), OP_EQ, "CircuitBuildTimeout is shorter (1"
+  expect_log_msg("CircuitBuildTimeout is shorter (1"
             " seconds) than the recommended minimum (10 seconds), and "
             "LearnCircuitBuildTimeout is disabled.  If tor isn't working, "
             "raise this value or enable LearnCircuitBuildTimeout.\n");
@@ -2496,7 +2511,7 @@ test_options_validate__circuits(void *ignored)
                                 "CircuitBuildTimeout 11\n"
                                 );
   options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
-  tt_str_op(mock_saved_log_at(1), OP_NE, "CircuitBuildTimeout is shorter (1 "
+  expect_no_log_msg("CircuitBuildTimeout is shorter (1 "
             "seconds) than the recommended minimum (10 seconds), and "
             "LearnCircuitBuildTimeout is disabled.  If tor isn't working, "
             "raise this value or enable LearnCircuitBuildTimeout.\n");
@@ -2590,7 +2605,7 @@ test_options_validate__rend(void *ignored)
                                 );
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(1), OP_EQ, "UseEntryGuards is disabled, but you"
+  expect_log_msg("UseEntryGuards is disabled, but you"
             " have configured one or more hidden services on this Tor "
             "instance.  Your hidden services will be very easy to locate using"
             " a well-known attack -- see http://freehaven.net/anonbib/#hs-"
@@ -2607,7 +2622,7 @@ test_options_validate__rend(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(1), OP_NE, "UseEntryGuards is disabled, but you"
+  expect_no_log_msg("UseEntryGuards is disabled, but you"
             " have configured one or more hidden services on this Tor "
             "instance.  Your hidden services will be very easy to locate using"
             " a well-known attack -- see http://freehaven.net/anonbib/#hs-"
@@ -2710,7 +2725,7 @@ test_options_validate__accounting(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(4), OP_EQ, "Using accounting with a hidden "
+  expect_log_msg("Using accounting with a hidden "
             "service and an ORPort is risky: your hidden service(s) and "
             "your public address will all turn off at the same time, "
             "which may alert observers that they are being run by the "
@@ -2727,7 +2742,7 @@ test_options_validate__accounting(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(4), OP_NE, "Using accounting with a hidden "
+  expect_no_log_msg("Using accounting with a hidden "
             "service and an ORPort is risky: your hidden service(s) and "
             "your public address will all turn off at the same time, "
             "which may alert observers that they are being run by the "
@@ -2746,7 +2761,7 @@ test_options_validate__accounting(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(3), OP_EQ, "Using accounting with multiple "
+  expect_log_msg("Using accounting with multiple "
             "hidden services is risky: they will all turn off at the same"
             " time, which may alert observers that they are being run by "
             "the same party.\n");
@@ -2957,7 +2972,7 @@ test_options_validate__proxy(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(2), OP_EQ, "HTTPProxy configured, but no SOCKS "
+  expect_log_msg("HTTPProxy configured, but no SOCKS "
             "proxy or HTTPS proxy configured. Watch out: this configuration "
             "will proxy unencrypted directory connections only.\n");
   tor_free(msg);
@@ -2970,7 +2985,7 @@ test_options_validate__proxy(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(2), OP_NE, "HTTPProxy configured, but no SOCKS "
+  expect_no_log_msg("HTTPProxy configured, but no SOCKS "
             "proxy or HTTPS proxy configured. Watch out: this configuration "
             "will proxy unencrypted directory connections only.\n");
   tor_free(msg);
@@ -2983,7 +2998,7 @@ test_options_validate__proxy(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(2), OP_NE, "HTTPProxy configured, but no SOCKS "
+  expect_no_log_msg("HTTPProxy configured, but no SOCKS "
             "proxy or HTTPS proxy configured. Watch out: this configuration "
             "will proxy unencrypted directory connections only.\n");
   tor_free(msg);
@@ -2996,7 +3011,7 @@ test_options_validate__proxy(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(2), OP_NE,
+  expect_no_log_msg(
             "HTTPProxy configured, but no SOCKS proxy or HTTPS proxy "
             "configured. Watch out: this configuration will proxy "
             "unencrypted directory connections only.\n");
@@ -3166,7 +3181,7 @@ test_options_validate__control(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(2), OP_EQ,
+  expect_log_msg(
             "ControlPort is open, but no authentication method has been "
             "configured.  This means that any program on your computer can "
             "reconfigure your Tor.  That's bad!  You should upgrade your Tor"
@@ -3182,7 +3197,7 @@ test_options_validate__control(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(2), OP_NE,
+  expect_no_log_msg(
             "ControlPort is open, but no authentication method has been "
             "configured.  This means that any program on your computer can "
             "reconfigure your Tor.  That's bad!  You should upgrade your Tor "
@@ -3199,7 +3214,7 @@ test_options_validate__control(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(2), OP_NE,
+  expect_no_log_msg(
             "ControlPort is open, but no authentication method has been "
             "configured.  This means that any program on your computer can "
             "reconfigure your Tor.  That's bad!  You should upgrade your Tor "
@@ -3214,7 +3229,7 @@ test_options_validate__control(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(2), OP_NE,
+  expect_no_log_msg(
             "ControlPort is open, but no authentication method has been "
             "configured.  This means that any program on your computer can "
             "reconfigure your Tor.  That's bad!  You should upgrade your Tor "
@@ -3229,7 +3244,7 @@ test_options_validate__control(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(2), OP_EQ,
+  expect_log_msg(
             "ControlSocket is world writable, but no authentication method has"
             " been configured.  This means that any program on your computer "
             "can reconfigure your Tor.  That's bad!  You should upgrade your "
@@ -3245,7 +3260,7 @@ test_options_validate__control(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(2), OP_NE,
+  expect_no_log_msg(
             "ControlSocket is world writable, but no authentication method has"
             " been configured.  This means that any program on your computer "
             "can reconfigure your Tor.  That's bad!  You should upgrade your "
@@ -3262,7 +3277,7 @@ test_options_validate__control(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(2), OP_NE,
+  expect_no_log_msg(
             "ControlSocket is world writable, but no authentication method has"
             " been configured.  This means that any program on your computer "
             "can reconfigure your Tor.  That's bad!  You should upgrade your "
@@ -3277,7 +3292,7 @@ test_options_validate__control(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(2), OP_NE,
+  expect_no_log_msg(
             "ControlSocket is world writable, but no authentication method has"
             " been configured.  This means that any program on your computer "
             "can reconfigure your Tor.  That's bad!  You should upgrade your "
@@ -3292,7 +3307,7 @@ test_options_validate__control(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(2), OP_EQ,
+  expect_log_msg(
             "CookieAuthFileGroupReadable is set, but will have no effect: you "
             "must specify an explicit CookieAuthFile to have it "
             "group-readable.\n");
@@ -3306,7 +3321,7 @@ test_options_validate__control(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(2), OP_NE,
+  expect_no_log_msg(
             "CookieAuthFileGroupReadable is set, but will have no effect: you "
             "must specify an explicit CookieAuthFile to have it "
             "group-readable.\n");
@@ -3343,7 +3358,7 @@ test_options_validate__families(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(2), OP_EQ,
+  expect_log_msg(
             "Listing a family for a bridge relay is not supported: it can "
             "reveal bridge fingerprints to censors. You should also make sure "
             "you aren't listing this bridge's fingerprint in any other "
@@ -3357,7 +3372,7 @@ test_options_validate__families(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(2), OP_NE,
+  expect_no_log_msg(
             "Listing a family for a bridge relay is not supported: it can "
             "reveal bridge fingerprints to censors. You should also make sure "
             "you aren't listing this bridge's fingerprint in any other "
@@ -3438,7 +3453,7 @@ test_options_validate__dir_auth(void *ignored)
   tt_str_op(msg, OP_EQ,
             "Directory authority/fallback line did not parse. See logs for "
             "details.");
-  tt_str_op(mock_saved_log_at(2), OP_EQ,
+  expect_log_msg(
             "You cannot set both DirAuthority and Alternate*Authority.\n");
   tor_free(msg);
 
@@ -3524,7 +3539,7 @@ test_options_validate__transport(void *ignored)
   tt_int_op(ret, OP_EQ, -1);
   tt_str_op(msg, OP_EQ,
             "Invalid client transport line. See logs for details.");
-  tt_str_op(mock_saved_log_at(3), OP_EQ,
+  expect_log_msg(
             "Too few arguments on ClientTransportPlugin line.\n");
   tor_free(msg);
 
@@ -3546,7 +3561,7 @@ test_options_validate__transport(void *ignored)
   tt_int_op(ret, OP_EQ, -1);
   tt_str_op(msg, OP_EQ,
             "Invalid server transport line. See logs for details.");
-  tt_str_op(mock_saved_log_at(3), OP_EQ,
+  expect_log_msg(
             "Too few arguments on ServerTransportPlugin line.\n");
   tor_free(msg);
 
@@ -3557,7 +3572,7 @@ test_options_validate__transport(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(3), OP_EQ,
+  expect_log_msg(
             "Tor is not configured as a relay but you specified a "
             "ServerTransportPlugin line (\"foo exec bar\"). The "
             "ServerTransportPlugin line will be ignored.\n");
@@ -3575,7 +3590,7 @@ test_options_validate__transport(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(3), OP_NE,
+  expect_no_log_msg(
             "Tor is not configured as a relay but you specified a "
             "ServerTransportPlugin line (\"foo exec bar\"). The "
             "ServerTransportPlugin line will be ignored.\n");
@@ -3599,7 +3614,7 @@ test_options_validate__transport(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(3), OP_EQ,
+  expect_log_msg(
             "You need at least a single managed-proxy to specify a transport "
             "listen address. The ServerTransportListenAddr line will be "
             "ignored.\n");
@@ -3618,7 +3633,7 @@ test_options_validate__transport(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(3), OP_NE,
+  expect_no_log_msg(
             "You need at least a single managed-proxy to specify a transport "
             "listen address. The ServerTransportListenAddr line will be "
             "ignored.\n");
@@ -3687,7 +3702,7 @@ test_options_validate__constrained_sockets(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(2), OP_EQ, "You have requested constrained "
+  expect_log_msg("You have requested constrained "
             "socket buffers while also serving directory entries via DirPort."
             "  It is strongly suggested that you disable serving directory"
             " requests when system TCP buffer resources are scarce.\n");
@@ -3701,7 +3716,7 @@ test_options_validate__constrained_sockets(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(2), OP_NE,
+  expect_no_log_msg(
             "You have requested constrained socket buffers while also serving"
             " directory entries via DirPort.  It is strongly suggested that "
             "you disable serving directory requests when system TCP buffer "
@@ -3824,7 +3839,7 @@ test_options_validate__v3_auth(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(2), OP_EQ, "V3AuthVotingInterval does not divide"
+  expect_log_msg("V3AuthVotingInterval does not divide"
             " evenly into 24 hours.\n");
   tor_free(msg);
 
@@ -3837,7 +3852,7 @@ test_options_validate__v3_auth(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(2), OP_NE, "V3AuthVotingInterval does not divide"
+  expect_no_log_msg("V3AuthVotingInterval does not divide"
             " evenly into 24 hours.\n");
   tor_free(msg);
 
@@ -3852,7 +3867,7 @@ test_options_validate__v3_auth(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(3), OP_EQ, "V3AuthVotingInterval is very low. "
+  expect_log_msg("V3AuthVotingInterval is very low. "
             "This may lead to failure to synchronise for a consensus.\n");
   tor_free(msg);
 
@@ -3985,7 +4000,7 @@ test_options_validate__exits(void *ignored)
                                 );
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(2), OP_EQ, "You have set AllowSingleHopExits; "
+  expect_log_msg("You have set AllowSingleHopExits; "
             "now your relay will allow others to make one-hop exits. However,"
             " since by default most clients avoid relays that set this option,"
             " most clients will ignore you.\n");
@@ -3999,7 +4014,7 @@ test_options_validate__exits(void *ignored)
   mock_clean_saved_logs();
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);
   tt_int_op(ret, OP_EQ, 0);
-  tt_str_op(mock_saved_log_at(2), OP_NE, "You have set AllowSingleHopExits; "
+  expect_no_log_msg("You have set AllowSingleHopExits; "
             "now your relay will allow others to make one-hop exits. However,"
             " since by default most clients avoid relays that set this option,"
             " most clients will ignore you.\n");
@@ -4044,7 +4059,7 @@ test_options_validate__testing_options(void *ignored)
   mock_clean_saved_logs();                                              \
   ret = options_validate(tdata->old_opt, tdata->opt, tdata->def_opt, 0, &msg);\
   tt_int_op(ret, OP_EQ, 0);                                             \
-  tt_str_op(mock_saved_log_at(3), OP_EQ, #name " is insanely high.\n"); \
+  expect_log_msg( #name " is insanely high.\n"); \
   tor_free(msg); \
   STMT_END
 
diff --git a/src/test/test_tortls.c b/src/test/test_tortls.c
index add020e9f4..98f5facc11 100644
--- a/src/test/test_tortls.c
+++ b/src/test/test_tortls.c
@@ -344,79 +344,67 @@ test_tortls_log_one_error(void *ignored)
   int previous_log = setup_capture_of_logs(LOG_INFO);
 
   tor_tls_log_one_error(NULL, 0, LOG_WARN, 0, "something");
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  tt_str_op(mock_saved_log_at(0), OP_EQ, "TLS error while something: "
+  expect_log_msg("TLS error while something: "
             "(null) (in (null):(null):---)\n");
 
   mock_clean_saved_logs();
   tor_tls_log_one_error(tls, 0, LOG_WARN, 0, NULL);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  tt_str_op(mock_saved_log_at(0), OP_EQ, "TLS error: (null) "
+  expect_log_msg("TLS error: (null) "
             "(in (null):(null):---)\n");
 
   mock_clean_saved_logs();
   tls->address = tor_strdup("127.hello");
   tor_tls_log_one_error(tls, 0, LOG_WARN, 0, NULL);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  tt_str_op(mock_saved_log_at(0), OP_EQ, "TLS error with 127.hello: (null) "
-            "(in (null):(null):---)\n");
+  expect_log_msg("TLS error with 127.hello: "
+            "(null) (in (null):(null):---)\n");
   tor_free(tls->address);
 
   mock_clean_saved_logs();
   tls->address = tor_strdup("127.hello");
   tor_tls_log_one_error(tls, 0, LOG_WARN, 0, "blarg");
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  tt_str_op(mock_saved_log_at(0), OP_EQ, "TLS error while blarg with "
+  expect_log_msg("TLS error while blarg with "
             "127.hello: (null) (in (null):(null):---)\n");
 
   mock_clean_saved_logs();
   tor_tls_log_one_error(tls, ERR_PACK(1, 2, 3), LOG_WARN, 0, NULL);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  tt_str_op(mock_saved_log_at(0), OP_EQ, "TLS error with 127.hello: "
+  expect_log_msg("TLS error with 127.hello: "
             "BN lib (in unknown library:(null):---)\n");
 
   mock_clean_saved_logs();
   tor_tls_log_one_error(tls, ERR_PACK(1, 2, SSL_R_HTTP_REQUEST),
                         LOG_WARN, 0, NULL);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  tt_int_op(mock_saved_severity_at(0), OP_EQ, LOG_INFO);
+  expect_log_severity(LOG_INFO);
 
   mock_clean_saved_logs();
   tor_tls_log_one_error(tls, ERR_PACK(1, 2, SSL_R_HTTPS_PROXY_REQUEST),
                         LOG_WARN, 0, NULL);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  tt_int_op(mock_saved_severity_at(0), OP_EQ, LOG_INFO);
+  expect_log_severity(LOG_INFO);
 
   mock_clean_saved_logs();
   tor_tls_log_one_error(tls, ERR_PACK(1, 2, SSL_R_RECORD_LENGTH_MISMATCH),
                         LOG_WARN, 0, NULL);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  tt_int_op(mock_saved_severity_at(0), OP_EQ, LOG_INFO);
+  expect_log_severity(LOG_INFO);
 
   mock_clean_saved_logs();
   tor_tls_log_one_error(tls, ERR_PACK(1, 2, SSL_R_RECORD_TOO_LARGE),
                         LOG_WARN, 0, NULL);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  tt_int_op(mock_saved_severity_at(0), OP_EQ, LOG_INFO);
+  expect_log_severity(LOG_INFO);
 
   mock_clean_saved_logs();
   tor_tls_log_one_error(tls, ERR_PACK(1, 2, SSL_R_UNKNOWN_PROTOCOL),
                         LOG_WARN, 0, NULL);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  tt_int_op(mock_saved_severity_at(0), OP_EQ, LOG_INFO);
+  expect_log_severity(LOG_INFO);
 
   mock_clean_saved_logs();
   tor_tls_log_one_error(tls, ERR_PACK(1, 2, SSL_R_UNSUPPORTED_PROTOCOL),
                         LOG_WARN, 0, NULL);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  tt_int_op(mock_saved_severity_at(0), OP_EQ, LOG_INFO);
+  expect_log_severity(LOG_INFO);
 
   tls->ssl = SSL_new(ctx);
 
   mock_clean_saved_logs();
   tor_tls_log_one_error(tls, 0, LOG_WARN, 0, NULL);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  tt_str_op(mock_saved_log_at(0), OP_EQ, "TLS error with 127.hello: (null)"
+  expect_log_msg("TLS error with 127.hello: (null)"
             " (in (null):(null):" SSL_STATE_STR ")\n");
 
  done:
@@ -450,27 +438,25 @@ test_tortls_get_error(void *ignored)
 
   ret = tor_tls_get_error(tls, 0, 0, "something", LOG_WARN, 0);
   tt_int_op(ret, OP_EQ, TOR_TLS_ERROR_IO);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  tt_str_op(mock_saved_log_at(0), OP_EQ, "TLS error: unexpected close while"
+  expect_log_msg("TLS error: unexpected close while"
             " something (before/accept initialization)\n");
 
   mock_clean_saved_logs();
   ret = tor_tls_get_error(tls, 2, 0, "something", LOG_WARN, 0);
   tt_int_op(ret, OP_EQ, 0);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 0);
+  expect_no_log_entry();
 
   mock_clean_saved_logs();
   ret = tor_tls_get_error(tls, 0, 1, "something", LOG_WARN, 0);
   tt_int_op(ret, OP_EQ, -11);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 0);
+  expect_no_log_entry();
 
   mock_clean_saved_logs();
   ERR_clear_error();
   ERR_put_error(ERR_LIB_BN, 2, -1, "somewhere.c", 99);
   ret = tor_tls_get_error(tls, 0, 0, "something", LOG_WARN, 0);
   tt_int_op(ret, OP_EQ, TOR_TLS_ERROR_MISC);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  tt_str_op(mock_saved_log_at(0), OP_EQ, "TLS error while something: (null)"
+  expect_log_msg("TLS error while something: (null)"
             " (in bignum routines:(null):before/accept initialization)\n");
 
   mock_clean_saved_logs();
@@ -479,7 +465,7 @@ test_tortls_get_error(void *ignored)
   SSL_get_rbio(tls->ssl)->flags = BIO_FLAGS_READ;
   ret = tor_tls_get_error(tls, -1, 0, "something", LOG_WARN, 0);
   tt_int_op(ret, OP_EQ, TOR_TLS_WANTREAD);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 0);
+  expect_no_log_entry();
 
   mock_clean_saved_logs();
   ERR_clear_error();
@@ -487,7 +473,7 @@ test_tortls_get_error(void *ignored)
   SSL_get_rbio(tls->ssl)->flags = BIO_FLAGS_WRITE;
   ret = tor_tls_get_error(tls, -1, 0, "something", LOG_WARN, 0);
   tt_int_op(ret, OP_EQ, TOR_TLS_WANTWRITE);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 0);
+  expect_no_log_entry();
 
   mock_clean_saved_logs();
   ERR_clear_error();
@@ -496,20 +482,18 @@ test_tortls_get_error(void *ignored)
   tls->ssl->s3->warn_alert =SSL_AD_CLOSE_NOTIFY;
   ret = tor_tls_get_error(tls, 0, 0, "something", LOG_WARN, 0);
   tt_int_op(ret, OP_EQ, TOR_TLS_CLOSE);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
+  expect_log_entry();
 
   mock_clean_saved_logs();
   ret = tor_tls_get_error(tls, 0, 2, "something", LOG_WARN, 0);
   tt_int_op(ret, OP_EQ, -10);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 0);
+  expect_no_log_entry();
 
   mock_clean_saved_logs();
   ERR_put_error(ERR_LIB_SYS, 2, -1, "somewhere.c", 99);
   ret = tor_tls_get_error(tls, -1, 0, "something", LOG_WARN, 0);
   tt_int_op(ret, OP_EQ, -9);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 2);
-  tt_str_op(mock_saved_log_at(1), OP_EQ,
-            "TLS error while something: (null) (in system library:"
+  expect_log_msg("TLS error while something: (null) (in system library:"
             "connect:before/accept initialization)\n");
 
  done:
@@ -1823,12 +1807,12 @@ test_tortls_debug_state_callback(void *ignored)
   ssl = tor_malloc_zero(sizeof(SSL));
 
   tor_tls_debug_state_callback(ssl, 32, 45);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  n = snprintf(buf, 1000, "SSL %p is now in state unknown"
+
+  n = tor_snprintf(buf, 1000, "SSL %p is now in state unknown"
                " state [type=32,val=45].\n", ssl);
-  buf[n]='\0';
-  if (strcasecmp(mock_saved_log_at(0), buf))
-    tt_str_op(mock_saved_log_at(0), OP_EQ, buf);
+  /* tor's snprintf returns -1 on error */
+  tt_int_op(n, OP_NE, -1);
+  expect_log_msg(buf);
 
  done:
   teardown_capture_of_logs(previous_log);
@@ -1864,21 +1848,17 @@ test_tortls_server_info_callback(void *ignored)
   SSL_set_state(ssl, SSL3_ST_SW_SRVR_HELLO_A);
   mock_clean_saved_logs();
   tor_tls_server_info_callback(ssl, SSL_CB_ACCEPT_LOOP, 0);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  tt_str_op(mock_saved_log_at(0), OP_EQ,
-            "Couldn't look up the tls for an SSL*. How odd!\n");
+  expect_log_msg("Couldn't look up the tls for an SSL*. How odd!\n");
 
   SSL_set_state(ssl, SSL3_ST_SW_SRVR_HELLO_B);
   mock_clean_saved_logs();
   tor_tls_server_info_callback(ssl, SSL_CB_ACCEPT_LOOP, 0);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 1);
-  tt_str_op(mock_saved_log_at(0), OP_EQ,
-            "Couldn't look up the tls for an SSL*. How odd!\n");
+  expect_log_msg("Couldn't look up the tls for an SSL*. How odd!\n");
 
   SSL_set_state(ssl, 99);
   mock_clean_saved_logs();
   tor_tls_server_info_callback(ssl, SSL_CB_ACCEPT_LOOP, 0);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 0);
+  expect_no_log_entry();
 
   SSL_set_ex_data(tls->ssl, tor_tls_object_ex_data_index, tls);
   SSL_set_state(ssl, SSL3_ST_SW_SRVR_HELLO_B);
@@ -2255,18 +2235,15 @@ test_tortls_handshake(void *ignored)
   tls->state = TOR_TLS_ST_HANDSHAKE;
   ret = tor_tls_handshake(tls);
   tt_int_op(ret, OP_EQ, TOR_TLS_ERROR_MISC);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 2);
+  expect_log_entry();
   /* This fails on jessie.  Investigate why! */
 #if 0
-  tt_str_op(mock_saved_log_at(0), OP_EQ,
-            "TLS error while handshaking: (null) (in bignum routines:"
+  expect_log_msg("TLS error while handshaking: (null) (in bignum routines:"
             "(null):SSLv3 write client hello B)\n");
-  tt_str_op(mock_saved_log_at(1), OP_EQ,
-            "TLS error while handshaking: (null) (in system library:"
+  expect_log_msg("TLS error while handshaking: (null) (in system library:"
             "connect:SSLv3 write client hello B)\n");
 #endif
-  tt_int_op(mock_saved_severity_at(0), OP_EQ, LOG_INFO);
-  tt_int_op(mock_saved_severity_at(1), OP_EQ, LOG_INFO);
+  expect_log_severity(LOG_INFO);
 
   tls->isServer = 0;
   method->ssl_connect = setting_error_ssl_connect;
@@ -2276,16 +2253,15 @@ test_tortls_handshake(void *ignored)
   tls->state = TOR_TLS_ST_HANDSHAKE;
   ret = tor_tls_handshake(tls);
   tt_int_op(ret, OP_EQ, TOR_TLS_ERROR_MISC);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 2);
+  expect_log_entry();
 #if 0
   /* See above */
-  tt_str_op(mock_saved_log_at(0), OP_EQ, "TLS error while handshaking: "
+  expect_log_msg("TLS error while handshaking: "
             "(null) (in bignum routines:(null):SSLv3 write client hello B)\n");
-  tt_str_op(mock_saved_log_at(1), OP_EQ, "TLS error while handshaking: "
+  expect_log_msg("TLS error while handshaking: "
             "(null) (in system library:connect:SSLv3 write client hello B)\n");
 #endif
-  tt_int_op(mock_saved_severity_at(0), OP_EQ, LOG_WARN);
-  tt_int_op(mock_saved_severity_at(1), OP_EQ, LOG_WARN);
+  expect_log_severity(LOG_WARN);
 
  done:
   teardown_capture_of_logs(previous_log);
diff --git a/src/test/test_util_process.c b/src/test/test_util_process.c
index cb1d5b2ebb..0a4354c043 100644
--- a/src/test/test_util_process.c
+++ b/src/test/test_util_process.c
@@ -34,8 +34,7 @@ test_util_process_set_waitpid_callback(void *ignored)
 
   res2 = set_waitpid_callback(pid, temp_callback, NULL);
   tt_assert(res2);
-  tt_str_op(mock_saved_log_at(0), OP_EQ,
-            "Replaced a waitpid monitor on pid 42. That should be "
+  expect_log_msg("Replaced a waitpid monitor on pid 42. That should be "
             "impossible.\n");
 
  done:
@@ -56,13 +55,12 @@ test_util_process_clear_waitpid_callback(void *ignored)
 
   res = set_waitpid_callback(pid, temp_callback, NULL);
   clear_waitpid_callback(res);
-  tt_int_op(mock_saved_log_number(), OP_EQ, 0);
+  expect_no_log_entry();
 
 #if 0
   /* No.  This is use-after-free.  We don't _do_ that. XXXX */
   clear_waitpid_callback(res);
-  tt_str_op(mock_saved_log_at(0), OP_EQ,
-            "Couldn't remove waitpid monitor for pid 43.\n");
+  expect_log_msg("Couldn't remove waitpid monitor for pid 43.\n");
 #endif
 
  done: