diff --git a/tools/ctest_retry.bash b/tools/ctest_retry.bash
index 42dcb46d2479b3d497dbabf24739be34bb28ff23..e65d6d2e2675f1a008c626e23efec9afa566477e 100755
--- a/tools/ctest_retry.bash
+++ b/tools/ctest_retry.bash
@@ -43,6 +43,8 @@ done
 
 total=$RETRIES
 cd $TESTDIR
+export RCUTILS_CONSOLE_STDOUT_LINE_BUFFERED=1
+
 echo "Retrying Ctest up to " $total " times."
 for ((i=1;i<=total;i++))
   do