diff --git a/backend/internal/service/account_usage_service_test.go b/backend/internal/service/account_usage_service_test.go
index ca153a3c4..6d7fa8fb5 100644
--- a/backend/internal/service/account_usage_service_test.go
+++ b/backend/internal/service/account_usage_service_test.go
@@ -5,6 +5,8 @@ import (
 	"net/http"
 	"testing"
 	"time"
+
+	"github.com/stretchr/testify/require"
 )
 
 type accountUsageCodexProbeRepo struct {
@@ -216,9 +218,7 @@ func TestBuildCodexUsageProgressFromExtra_ZerosExpiredWindow(t *testing.T) {
 			"codex_5h_reset_at":     "2026-03-16T10:00:00Z", // 2h ago
 		}
 		progress := buildCodexUsageProgressFromExtra(extra, "5h", now)
-		if progress == nil {
-			t.Fatal("expected non-nil progress")
-		}
+		require.NotNil(t, progress)
 		if progress.Utilization != 0 {
 			t.Fatalf("expected Utilization=0 for expired window, got %v", progress.Utilization)
 		}
@@ -234,9 +234,7 @@ func TestBuildCodexUsageProgressFromExtra_ZerosExpiredWindow(t *testing.T) {
 			"codex_5h_reset_at":     resetAt,
 		}
 		progress := buildCodexUsageProgressFromExtra(extra, "5h", now)
-		if progress == nil {
-			t.Fatal("expected non-nil progress")
-		}
+		require.NotNil(t, progress)
 		if progress.Utilization != 42.0 {
 			t.Fatalf("expected Utilization=42, got %v", progress.Utilization)
 		}
@@ -248,9 +246,7 @@ func TestBuildCodexUsageProgressFromExtra_ZerosExpiredWindow(t *testing.T) {
 			"codex_7d_reset_at":     "2026-03-15T00:00:00Z", // yesterday
 		}
 		progress := buildCodexUsageProgressFromExtra(extra, "7d", now)
-		if progress == nil {
-			t.Fatal("expected non-nil progress")
-		}
+		require.NotNil(t, progress)
 		if progress.Utilization != 0 {
 			t.Fatalf("expected Utilization=0 for expired 7d window, got %v", progress.Utilization)
 		}
diff --git a/backend/internal/service/ratelimit_service_anthropic_test.go b/backend/internal/service/ratelimit_service_anthropic_test.go
index c02ad00e1..0755a0256 100644
--- a/backend/internal/service/ratelimit_service_anthropic_test.go
+++ b/backend/internal/service/ratelimit_service_anthropic_test.go
@@ -248,9 +248,7 @@ func TestSelectAnthropicFableWindowLimit_FallsBackToAggregateReset(t *testing.T)
 	headers.Set("anthropic-ratelimit-unified-reset", strconv.FormatInt(reset.Unix(), 10))
 
 	limit := selectAnthropicFableWindowLimit(headers, now)
-	if limit == nil {
-		t.Fatal("expected non-nil limit via aggregate reset fallback")
-	}
+	require.NotNil(t, limit)
 	if !limit.resetAt.Equal(reset) {
 		t.Errorf("expected resetAt=%v, got %v", reset, limit.resetAt)
 	}