diff --git a/x/auth/ante_test.go b/x/auth/ante_test.go
index 03be6b91c8..3f0350c429 100644
--- a/x/auth/ante_test.go
+++ b/x/auth/ante_test.go
@@ -723,6 +723,7 @@ func TestEnsureSufficientMempoolFees(t *testing.T) {
 		input      StdFee
 		expectedOK bool
 	}{
+		{NewStdFee(200000, sdk.Coins{}), false},
 		{NewStdFee(200000, sdk.NewCoins(sdk.NewInt64Coin("photino", 5))), false},
 		{NewStdFee(200000, sdk.NewCoins(sdk.NewInt64Coin("stake", 1))), false},
 		{NewStdFee(200000, sdk.NewCoins(sdk.NewInt64Coin("stake", 2))), true},