diff --git a/docker/test/fuzzer/run-fuzzer.sh b/docker/test/fuzzer/run-fuzzer.sh
index 200c7b6f4ce..0a282133690 100755
--- a/docker/test/fuzzer/run-fuzzer.sh
+++ b/docker/test/fuzzer/run-fuzzer.sh
@@ -75,7 +75,7 @@ function fuzz
 {
     # Obtain the list of newly added tests. They will be fuzzed in more extreme way than other tests.
     cd ch
-    NEW_TESTS=$(git diff --name-only origin/master "$SHA_TO_TEST" | grep -P 'tests/queries/0_stateless/.*\.sql' | sed -r -e 's!^!ch/!' | sort -R)
+    NEW_TESTS=$(git diff --name-only $(git merge-base origin/master "$SHA_TO_TEST"~) "$SHA_TO_TEST" | grep -P 'tests/queries/0_stateless/.*\.sql' | sed -r -e 's!^!ch/!' | sort -R)
     cd ..
     if [[ -n "$NEW_TESTS" ]]
     then