diff --git a/client/driver/executor/test_harness_test.go b/client/driver/executor/test_harness_test.go
index 7bfa42dfb..d2e0b74e5 100644
--- a/client/driver/executor/test_harness_test.go
+++ b/client/driver/executor/test_harness_test.go
@@ -140,6 +140,7 @@ func testExecutor(t *testing.T, buildExecutor func() Executor, compatible func(*
 	Executor_Start_Wait(t, command)
 	Executor_Start_Kill(t, command)
 	Executor_Open(t, command, buildExecutor)
+	Executor_Open_Invalid(t, command, buildExecutor)
 }
 
 type buildExecCommand func(name string, args ...string) Executor