diff --git a/scripts/test/cov-test-determinism.sh b/scripts/test/cov-test-determinism.sh
index 3b4f372e04..3458f96968 100755
--- a/scripts/test/cov-test-determinism.sh
+++ b/scripts/test/cov-test-determinism.sh
@@ -25,6 +25,9 @@ else
 fi
 
 if test "$run" = 1; then
+    # same seed as in travis.yml
+    TOR_TEST_RNG_SEED="636f766572616765"
+    export TOR_TEST_RNG_SEED
     while true; do
         make reset-gcov
         CD=coverage-raw/coverage-$(date +%s)