tests: make test for missing repo more precise

Signed-off-by: Lars Wirzenius <liw@liw.fi>

test-suite

@@ -140,7 +140,7 @@ class Suite:
         self.assert_error(resps[1])
 
     def test_repository_does_not_exist(self):
-        rid = "rad:z3qg5TKmN83afz2fj9z3fQjU8vaYE"
+        rid = "rad:z3aaaaaaaaaaaaaaaaaaaaaaaaaaa"
         commit = "8d947e182b096ec009e1c9eda9e6a67f5eef83d9"
 
         ci = self._create_ci()
@@ -154,6 +154,7 @@ class Suite:
         error = resps[1]["result"]["error"]
         assert "git" in error
         assert "clone" in error
+        assert rid[len("rad:") :] in error
 
     def test_native_yaml_has_no_shell(self):
         exit, resps, stderr = self._test_case("no-shell", None)