diff --git a/src/internal/cpu/cpu_test.go b/src/internal/cpu/cpu_test.go
index 8c21256b34..e72d2d639c 100644
--- a/src/internal/cpu/cpu_test.go
+++ b/src/internal/cpu/cpu_test.go
@@ -10,7 +10,6 @@ import (
 	"internal/testenv"
 	"os"
 	"os/exec"
-	"strings"
 	"testing"
 )
 
@@ -35,13 +34,9 @@ func runDebugOptionsTest(t *testing.T, test string, options string) {
 	cmd.Env = append(cmd.Env, env)
 
 	output, err := cmd.CombinedOutput()
-	lines := strings.Fields(string(output))
-	lastline := lines[len(lines)-1]
-
-	got := strings.TrimSpace(lastline)
-	want := "PASS"
-	if err != nil || got != want {
-		t.Fatalf("%s with %s: want %s, got %v", test, env, want, got)
+	if err != nil {
+		t.Fatalf("%s with %s: run failed: %v output:\n%s\n",
+			test, env, err, string(output))
 	}
 }