diff --git a/test/test-all.sh b/test/test-all.sh
index efc0091b11..48073bce7a 100755
--- a/test/test-all.sh
+++ b/test/test-all.sh
@@ -23,7 +23,7 @@ function usage() {
     echo "injects the <tint>/tools directory as the second command line argument"
     echo
     echo "Usage of <tint>/tools/test-runner:"
-    SCRIPT_DIR/../tools/test-runner --help
+    "${SCRIPT_DIR}/../tools/test-runner" --help
 }
 
 TINT="$1"