diff --git a/scripts/test/cov-exclude b/scripts/test/cov-exclude
index 5117f11ec4..5cb9b1282d 100755
--- a/scripts/test/cov-exclude
+++ b/scripts/test/cov-exclude
@@ -26,3 +26,9 @@ if ($excluding or $exclude_this) {
   s{^\s*\#\#+:}{        x:};
   s{^   (\s*)(\d+):}{$1!!!$2:};
 }
+
+if (eof and $excluding) {
+    warn "Runaway LCOV_EXCL_START in $ARGV";
+    $excluding = 0;
+}
+
diff --git a/src/common/address.c b/src/common/address.c
index 701daace57..c5d0e918ca 100644
--- a/src/common/address.c
+++ b/src/common/address.c
@@ -1198,7 +1198,7 @@ tor_addr_hash(const tor_addr_t *addr)
     /* LCOV_EXCL_START */
     tor_fragile_assert();
     return 0;
-    /* LCOV_EXCL_END */
+    /* LCOV_EXCL_STOP */
   }
 }
 
diff --git a/src/or/onion_tap.c b/src/or/onion_tap.c
index 9a65fcf014..294fc0df6d 100644
--- a/src/or/onion_tap.c
+++ b/src/or/onion_tap.c
@@ -159,7 +159,7 @@ onion_skin_TAP_server_handshake(
      * big. That should be impossible. */
     log_info(LD_GENERAL, "crypto_dh_get_public failed.");
     goto err;
-    /* LCOV_EXCP_STOP */
+    /* LCOV_EXCL_STOP */
   }
 
   key_material_len = DIGEST_LEN+key_out_len;