diff --git a/mk/run_test.sh b/mk/run_test.sh
index b876859f8..7e95df2ac 100755
--- a/mk/run_test.sh
+++ b/mk/run_test.sh
@@ -28,7 +28,7 @@ run_test "$1"
 # See https://github.com/NixOS/nix/issues/3605 for more info
 if [[ $status -ne 0 && $status -ne 99 && \
     "$(uname)" == "Darwin" && \
-    "$log" =~ "unexpected EOF reading a line"
+    "$log" =~ "unexpected EOF reading a line" \
 ]]; then
     echo "$post_run_msg [${yellow}FAIL$normal] (possibly flaky, so will be retried)"
     echo "$log" | sed 's/^/    /'