diff --git a/tests/test.fish b/tests/test.fish
index 61bf3e353..2af916e8d 100644
--- a/tests/test.fish
+++ b/tests/test.fish
@@ -75,7 +75,7 @@ function test_littlecheck_file
     set -l file $argv[1]
     echo -n "Testing file $file ... "
     set starttime (timestamp)
-    $python ../littlecheck.py \
+    $python -S ../littlecheck.py \
         -s fish=../test/root/bin/fish \
         -s fish_test_helper=../test/root/bin/fish_test_helper \
         $file