diff --git a/tests/init.test b/tests/init.test
index 2c6c3ef..a6c6bf7 100755
--- a/tests/init.test
+++ b/tests/init.test
@@ -194,7 +194,7 @@ set_ssh_keys_gcp_body() {
 	fake_bin getent <<-EOF
 		#!/bin/sh
 		echo "alpine:x:1000:1000:Linux User,,,:/home/alpine:/bin/sh" |
-			grep "^$1:"
+			grep "^\$1:"
 	EOF
 	fake_metadata_gcp <<-EOF
 		project: