diff --git a/src/cmd/compile/internal/ssa/stmtlines_test.go b/src/cmd/compile/internal/ssa/stmtlines_test.go
index b55ac2b3f4e..2bdd6c80b2d 100644
--- a/src/cmd/compile/internal/ssa/stmtlines_test.go
+++ b/src/cmd/compile/internal/ssa/stmtlines_test.go
@@ -138,11 +138,12 @@ func TestStmtLines(t *testing.T) {
 	}
 
 	var m float64
-	if runtime.GOARCH == "amd64" {
+	switch runtime.GOARCH {
+	case "amd64":
 		m = 0.0111 // > 98.89% obtained on amd64, no backsliding
-	} else if runtime.GOARCH == "riscv64" {
+	case "riscv64":
 		m = 0.03 // XXX temporary update threshold to 97% for regabi
-	} else {
+	default:
 		m = 0.02 // expect 98% elsewhere.
 	}