diff --git a/Formula/s/systemd.rb b/Formula/s/systemd.rb
index a14cae88e844d..ab983e95ed46f 100644
--- a/Formula/s/systemd.rb
+++ b/Formula/s/systemd.rb
@@ -107,6 +107,6 @@ def install
   end
 
   test do
-    assert_match "temporary: /tmp", shell_output("#{bin}/systemd-path")
+    assert_match "temporary: /tmp", shell_output(bin/"systemd-path")
   end
 end