diff --git a/ssa/interp/testdata/coverage.go b/ssa/interp/testdata/coverage.go
index d7d6940d..2d0e5bb4 100644
--- a/ssa/interp/testdata/coverage.go
+++ b/ssa/interp/testdata/coverage.go
@@ -248,6 +248,7 @@ func main() {
 	switch {
 	default:
 		fallthrough
+	case false:
 	}
 
 	// string -> []rune conversion.