diff --git a/cache/cache_test.go b/cache/cache_test.go
index 9dc9430..872672d 100644
--- a/cache/cache_test.go
+++ b/cache/cache_test.go
@@ -320,24 +320,18 @@ func TestCache_ConcurrentReads(t *testing.T) {
 	logger := slog.New(slog.NewTextHandler(os.Stdout, nil))
 	c := New(logger)
 
-	// Setup test data
+	// Setup test data - use legacy hash to avoid slow bcrypt
 	orgID := uuid.New().String()
-	apiKey := "test-concurrent-key" // gitleaks:allow
-	hashedKey, err := hash.APIKey(apiKey)
-	require.NoError(t, err)
+	userSub := "test-user"
 
 	org := domain.Organization{
 		BaseAggregate: eventsourced.BaseAggregateFromString(orgID),
 		Name:          "Concurrent Test Org",
 	}
 	c.organizations[orgID] = org
-	c.apiKeys[apiKeyId(orgID, "test-key")] = domain.APIKey{
-		Name:           "test-key",
-		OrganizationId: orgID,
-		Key:            hashedKey,
-	}
+	c.users[userSub] = []string{orgID}
 
-	// Run concurrent reads (reduced for race detector)
+	// Run concurrent reads using fast OrganizationsByUser
 	var wg sync.WaitGroup
 	numGoroutines := 20
 
@@ -345,9 +339,9 @@ func TestCache_ConcurrentReads(t *testing.T) {
 		wg.Add(1)
 		go func() {
 			defer wg.Done()
-			org := c.OrganizationByAPIKey(apiKey)
-			assert.NotNil(t, org)
-			assert.Equal(t, "Concurrent Test Org", org.Name)
+			orgs := c.OrganizationsByUser(userSub)
+			assert.NotEmpty(t, orgs)
+			assert.Equal(t, "Concurrent Test Org", orgs[0].Name)
 		}()
 	}