t.Run(tt.name, func(t *testing.T) {
			env, err := environment.MustBaseEnvSet(environment.DefaultCompatibilityVersion(), true).Extend(
				environment.VersionedOptions{
					IntroducedVersion: version.MajorMinor(1, 999),
					EnvOptions:        []celgo.EnvOption{celgo.Lib(&fakeLib{})},
				})
			if err != nil {
				t.Fatal(err)
			}
			loader := NewExpressionsEnvLoader()
			if tt.unmodified {