diff --git a/yudao-module-system/yudao-module-system-biz/src/test/java/cn/iocoder/yudao/module/system/service/oauth2/OAuth2ClientServiceImplTest.java b/yudao-module-system/yudao-module-system-biz/src/test/java/cn/iocoder/yudao/module/system/service/oauth2/OAuth2ClientServiceImplTest.java
index 50401cf97..3a671b0b9 100755
--- a/yudao-module-system/yudao-module-system-biz/src/test/java/cn/iocoder/yudao/module/system/service/oauth2/OAuth2ClientServiceImplTest.java
+++ b/yudao-module-system/yudao-module-system-biz/src/test/java/cn/iocoder/yudao/module/system/service/oauth2/OAuth2ClientServiceImplTest.java
@@ -153,6 +153,19 @@ public class OAuth2ClientServiceImplTest extends BaseDbUnitTest {
         assertServiceException(() -> oauth2ClientService.validateClientIdExists(null, clientId), OAUTH2_CLIENT_EXISTS);
     }
 
+    @Test
+    public void testGetOAuth2Client() {
+        // mock 数据
+        OAuth2ClientDO clientDO = randomPojo(OAuth2ClientDO.class);
+        oauth2ClientMapper.insert(clientDO);
+        // 准备参数
+        Long id = clientDO.getId();
+
+        // 调用，并断言
+        OAuth2ClientDO dbClientDO = oauth2ClientService.getOAuth2Client(id);
+        assertPojoEquals(clientDO, dbClientDO);
+    }
+
     @Test
     public void testGetOAuth2ClientPage() {
        // mock 数据
@@ -203,10 +216,13 @@ public class OAuth2ClientServiceImplTest extends BaseDbUnitTest {
                 null, null, Collections.singleton(randomString()), null), OAUTH2_CLIENT_SCOPE_OVER);
         assertServiceException(() -> oauth2ClientService.validOAuthClientFromCache("default",
                 null, null, null, "test"), OAUTH2_CLIENT_REDIRECT_URI_NOT_MATCH, "test");
-        // 成功调用
+        // 成功调用（1：参数完整）
         OAuth2ClientDO result = oauth2ClientService.validOAuthClientFromCache(client.getClientId(), client.getSecret(),
                 client.getAuthorizedGrantTypes().get(0), client.getScopes(), client.getRedirectUris().get(0));
         assertPojoEquals(client, result);
+        // 成功调用（2：只有 clientId 参数）
+        result = oauth2ClientService.validOAuthClientFromCache(client.getClientId());
+        assertPojoEquals(client, result);
     }
 
 }
diff --git a/yudao-module-system/yudao-module-system-biz/src/test/java/cn/iocoder/yudao/module/system/service/oauth2/OAuth2GrantServiceImplTest.java b/yudao-module-system/yudao-module-system-biz/src/test/java/cn/iocoder/yudao/module/system/service/oauth2/OAuth2GrantServiceImplTest.java
index 944086671..52c722831 100644
--- a/yudao-module-system/yudao-module-system-biz/src/test/java/cn/iocoder/yudao/module/system/service/oauth2/OAuth2GrantServiceImplTest.java
+++ b/yudao-module-system/yudao-module-system-biz/src/test/java/cn/iocoder/yudao/module/system/service/oauth2/OAuth2GrantServiceImplTest.java
@@ -16,6 +16,7 @@ import java.util.List;
 import static cn.hutool.core.util.RandomUtil.randomEle;
 import static cn.iocoder.yudao.framework.test.core.util.AssertUtils.assertPojoEquals;
 import static cn.iocoder.yudao.framework.test.core.util.RandomUtils.*;
+import static java.util.Collections.emptyList;
 import static org.junit.jupiter.api.Assertions.*;
 import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.when;
@@ -134,6 +135,13 @@ public class OAuth2GrantServiceImplTest extends BaseMockitoUnitTest {
                 refreshToken, clientId));
     }
 
+    @Test
+    public void testGrantClientCredentials() {
+        assertThrows(UnsupportedOperationException.class,
+                () -> oauth2GrantService.grantClientCredentials(randomString(), emptyList()),
+                "暂时不支持 client_credentials 授权模式");
+    }
+
     @Test
     public void testRevokeToken_clientIdError() {
         // 准备参数