diff --git a/extra/io/unix/launcher/launcher-tests.factor b/extra/io/unix/launcher/launcher-tests.factor
old mode 100644
new mode 100755
index aa54d3ec94..6fa8c913aa
--- a/extra/io/unix/launcher/launcher-tests.factor
+++ b/extra/io/unix/launcher/launcher-tests.factor
@@ -34,7 +34,7 @@ accessors kernel sequences ;
     ascii <process-stream> contents
 ] unit-test
 
-[ "" ] [
+[ f ] [
     <process>
         "cat"
         "launcher-test-1" temp-file
@@ -55,7 +55,7 @@ accessors kernel sequences ;
     try-process
 ] unit-test
 
-[ "" ] [
+[ f ] [
     "cat"
     "launcher-test-1" temp-file
     2array