diff --git a/pkg/calc.go b/pkg/calc.go
index d33941d..470a146 100644
--- a/pkg/calc.go
+++ b/pkg/calc.go
@@ -4,6 +4,10 @@ func Inc(x int) int {
 	return x + 1
 }
 
+func IncMiddle(x int) int {
+	return x + 1
+}
+
 func IncAgain(x int) int {
 	return x + 1
 }
diff --git a/pkg/calc_test.go b/pkg/calc_test.go
index 607ef2d..7b775a5 100644
--- a/pkg/calc_test.go
+++ b/pkg/calc_test.go
@@ -7,6 +7,7 @@ func TestInc(t *testing.T) {
 		t.Fatal("inc")
 	}
 	_ = IncAgain(1)
+	_ = IncMiddle(1)
 }
 
 func TestClamp(t *testing.T) {