diff --git a/src/subprocess_test.cc b/src/subprocess_test.cc
index 0a8c206..6e487db 100644
--- a/src/subprocess_test.cc
+++ b/src/subprocess_test.cc
@@ -182,7 +182,7 @@
     "cmd /c echo hi",
     "cmd /c time /t",
 #else
-    "whoami",
+    "id -u",
     "pwd",
 #endif
   };