diff --git a/tests/test.fish b/tests/test.fish
index b94fe5a78..f220e9dd3 100644
--- a/tests/test.fish
+++ b/tests/test.fish
@@ -11,9 +11,9 @@ set -x FISH_UNIT_TESTS_RUNNING 1
 # Change to directory containing this script
 cd (dirname (status -f))
 
-# Test files specified on commandline, or all *.in files
+# Test files specified on commandline, or all checks.
 if set -q argv[1]
-    set files_to_test $argv.in
+    set files_to_test checks/$argv.fish
 else
     set files_to_test checks/*.fish
 end