diff --git a/internal/vpncscript/cmd_test.go b/internal/vpncscript/cmd_test.go
index f91da05d..b2810b89 100644
--- a/internal/vpncscript/cmd_test.go
+++ b/internal/vpncscript/cmd_test.go
@@ -30,6 +30,14 @@ func TestRun(t *testing.T) {
 		t.Errorf("invalid token should return error")
 	}
 
+	// test connect with config creation error, invalid VPN PID
+	os.Clearenv()
+	t.Setenv("reason", "connect")
+	t.Setenv("VPNPID", "not a valid vpn pid!")
+	if err := run([]string{"test"}); err == nil {
+		t.Errorf("invalid config should return error")
+	}
+
 	// prepare environment with not existing sockfile
 	os.Clearenv()
 	sockfile := filepath.Join(t.TempDir(), "sockfile")
diff --git a/internal/vpncscript/env_test.go b/internal/vpncscript/env_test.go
index 03b5dc78..1d623aed 100644
--- a/internal/vpncscript/env_test.go
+++ b/internal/vpncscript/env_test.go
@@ -11,7 +11,7 @@ import (
 func setEnviron(env []string) {
 	for _, e := range env {
 		pair := strings.SplitN(e, "=", 2)
-		os.Setenv(pair[0], pair[1])
+		_ = os.Setenv(pair[0], pair[1])
 	}
 }