diff --git a/tests/MergeGame.Server.Tests/MergeGame.Server.Tests.csproj b/tests/MergeGame.Server.Tests/MergeGame.Server.Tests.csproj
index 0556dd5..dbd4497 100644
--- a/tests/MergeGame.Server.Tests/MergeGame.Server.Tests.csproj
+++ b/tests/MergeGame.Server.Tests/MergeGame.Server.Tests.csproj
@@ -18,7 +18,7 @@
     <!-- 실제 서버 진입점을 메모리 TestServer로 실행해 OpenAPI HTTP 계약을 검사합니다. -->
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="8.0.29" />
     <!-- 실제 MySQL 없이 서비스의 EF Core 저장 동작을 빠르게 검증합니다. -->
-    <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="8.0.29" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="9.0.19" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
     <!-- 발급된 JWT를 테스트에서 역직렬화하고 실제 HMAC 서명을 검증합니다. -->
     <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="7.7.3" />
diff --git a/tests/MergeGame.Server.Tests/packages.lock.json b/tests/MergeGame.Server.Tests/packages.lock.json
index 7489cf0..130bb0d 100644
--- a/tests/MergeGame.Server.Tests/packages.lock.json
+++ b/tests/MergeGame.Server.Tests/packages.lock.json
@@ -21,11 +21,13 @@
       },
       "Microsoft.EntityFrameworkCore.InMemory": {
         "type": "Direct",
-        "requested": "[8.0.29, )",
-        "resolved": "8.0.29",
-        "contentHash": "LLVpKlP2bTE+Zbbq63pAT3ObaIiqEsecOD5jwIAV0OAJ9hZFzdAMElzcT/jnaFYIYFu37HzCUwtFQv0lujD7bg==",
+        "requested": "[9.0.19, )",
+        "resolved": "9.0.19",
+        "contentHash": "6hAGqYywlgbpF+9mNNnoVQ1cU5bMIJdWxF6G4RuTtK4REGXi2Kg6J3UF8tFU0fFZWVp2gpTIi6G/lmDKD7VoVQ==",
         "dependencies": {
-          "Microsoft.EntityFrameworkCore": "8.0.29"
+          "Microsoft.EntityFrameworkCore": "9.0.19",
+          "Microsoft.Extensions.Caching.Memory": "9.0.19",
+          "Microsoft.Extensions.Logging": "9.0.19"
         }
       },
       "Microsoft.NET.Test.Sdk": {
@@ -88,24 +90,24 @@
       },
       "Microsoft.EntityFrameworkCore": {
         "type": "Transitive",
-        "resolved": "8.0.29",
-        "contentHash": "+4Md9S8HcJEkoatsVTiYrF621StlxS8bpnQMSYYbAVRnMGHWLhtlbgqTYdO8+zxuyIqAjiFAYtWr/oJ9KC7X7Q==",
+        "resolved": "9.0.19",
+        "contentHash": "qWqqxrfEDfi3C/z0S/ACIA2gUnreRPHX74WE/dVnesbztNesYO4NLy76lE6FV/zDP4vH/pkvDr8h3Mq9+cFv/w==",
         "dependencies": {
-          "Microsoft.EntityFrameworkCore.Abstractions": "8.0.29",
-          "Microsoft.EntityFrameworkCore.Analyzers": "8.0.29",
-          "Microsoft.Extensions.Caching.Memory": "8.0.1",
-          "Microsoft.Extensions.Logging": "8.0.1"
+          "Microsoft.EntityFrameworkCore.Abstractions": "9.0.19",
+          "Microsoft.EntityFrameworkCore.Analyzers": "9.0.19",
+          "Microsoft.Extensions.Caching.Memory": "9.0.19",
+          "Microsoft.Extensions.Logging": "9.0.19"
         }
       },
       "Microsoft.EntityFrameworkCore.Abstractions": {
         "type": "Transitive",
-        "resolved": "8.0.29",
-        "contentHash": "z5JLj2mWCuxnhP7oP9udaHxOK5FQWPpvjXeTmCMjRRCYZ1k+gUlb9Vznx2LHSFXww4ZHjztKbxezNTTu/T6znw=="
+        "resolved": "9.0.19",
+        "contentHash": "igPnmVL3DU2ZH/4DNeQqWttNrQpwwg0q6MWj5peZxtl0QVMDSeFtnt2yhhdSffklZKYsAFko1sh/va3z4y7S6A=="
       },
       "Microsoft.EntityFrameworkCore.Analyzers": {
         "type": "Transitive",
-        "resolved": "8.0.29",
-        "contentHash": "rC/q2K3JGSKJpEraRDRJ3NUOH4e+CpwwCIbbKGXi87J6LuGdIg0+yggCSPCmV2PwSSlegZSg+le++O4IBRecLA=="
+        "resolved": "9.0.19",
+        "contentHash": "yI5dQuvigJ6ICQECOlJDtrsUYcuDryv3qsZK1i6ZA/IzMzZ/VPkDzjE4r2LivuyVSGnkDRkH2cp4LmrhXARRKw=="
       },
       "Microsoft.EntityFrameworkCore.Relational": {
         "type": "Transitive",
@@ -123,22 +125,22 @@
       },
       "Microsoft.Extensions.Caching.Abstractions": {
         "type": "Transitive",
-        "resolved": "8.0.0",
-        "contentHash": "3KuSxeHoNYdxVYfg2IRZCThcrlJ1XJqIXkAWikCsbm5C/bCjv7G0WoKDyuR98Q+T607QT2Zl5GsbGRkENcV2yQ==",
+        "resolved": "9.0.19",
+        "contentHash": "qe/6m6wxRG+N5xTf4Z3lDBAiVu6oBCUyADJ5OzlFgukD9Vg/6zB3MNnNEFA7amZg8hjcS6F4OZBRmB07A+gmHQ==",
         "dependencies": {
-          "Microsoft.Extensions.Primitives": "8.0.0"
+          "Microsoft.Extensions.Primitives": "9.0.19"
         }
       },
       "Microsoft.Extensions.Caching.Memory": {
         "type": "Transitive",
-        "resolved": "8.0.1",
-        "contentHash": "HFDnhYLccngrzyGgHkjEDU5FMLn4MpOsr5ElgsBMC4yx6lJh4jeWO7fHS8+TXPq+dgxCmUa/Trl8svObmwW4QA==",
+        "resolved": "9.0.19",
+        "contentHash": "Y0w5LkBqWkDh5vYTKM+QKlzxpqegEtP86oDhFMXgx4tDkWL2t+rl4h2vxBHkvBtM/gM6PoLK9QCrnoclXtHtVQ==",
         "dependencies": {
-          "Microsoft.Extensions.Caching.Abstractions": "8.0.0",
-          "Microsoft.Extensions.DependencyInjection.Abstractions": "8.0.2",
-          "Microsoft.Extensions.Logging.Abstractions": "8.0.2",
-          "Microsoft.Extensions.Options": "8.0.2",
-          "Microsoft.Extensions.Primitives": "8.0.0"
+          "Microsoft.Extensions.Caching.Abstractions": "9.0.19",
+          "Microsoft.Extensions.DependencyInjection.Abstractions": "9.0.19",
+          "Microsoft.Extensions.Logging.Abstractions": "9.0.19",
+          "Microsoft.Extensions.Options": "9.0.19",
+          "Microsoft.Extensions.Primitives": "9.0.19"
         }
       },
       "Microsoft.Extensions.Configuration": {
@@ -220,16 +222,16 @@
       },
       "Microsoft.Extensions.DependencyInjection": {
         "type": "Transitive",
-        "resolved": "8.0.1",
-        "contentHash": "BmANAnR5Xd4Oqw7yQ75xOAYODybZQRzdeNucg7kS5wWKd2PNnMdYtJ2Vciy0QLylRmv42DGl5+AFL9izA6F1Rw==",
+        "resolved": "9.0.19",
+        "contentHash": "o/XFYSiV4a7eiCkf7W1GFAviVhHQAPY5bHrQRsNWAPT3GhJ3Af63vcFQjHivIrTNZITlPPaGWhBy7jykKYYyaQ==",
         "dependencies": {
-          "Microsoft.Extensions.DependencyInjection.Abstractions": "8.0.2"
+          "Microsoft.Extensions.DependencyInjection.Abstractions": "9.0.19"
         }
       },
       "Microsoft.Extensions.DependencyInjection.Abstractions": {
         "type": "Transitive",
-        "resolved": "8.0.2",
-        "contentHash": "3iE7UF7MQkCv1cxzCahz+Y/guQbTqieyxyaWKhrRO91itI9cOKO76OHeQDahqG4MmW5umr3CcCvGmK92lWNlbg=="
+        "resolved": "9.0.19",
+        "contentHash": "XgQ0aVWClYjYSBqbYrKC/xyZ1KHf+VVwNF3+d54jcaqnst30Q//ugs/FJwUztLZiph0gp85g7i/eB0556twO0Q=="
       },
       "Microsoft.Extensions.DependencyModel": {
         "type": "Transitive",
@@ -321,20 +323,21 @@
       },
       "Microsoft.Extensions.Logging": {
         "type": "Transitive",
-        "resolved": "8.0.1",
-        "contentHash": "4x+pzsQEbqxhNf1QYRr5TDkLP9UsLT3A6MdRKDDEgrW7h1ljiEPgTNhKYUhNCCAaVpQECVQ+onA91PTPnIp6Lw==",
+        "resolved": "9.0.19",
+        "contentHash": "3cnWzJ/FLEhLiW+TJTWtTjVj6fwlsP8OrbJqgOP4J9feAKjmT77vmClakHlej+jnzBgpnVU0+SZwtEIOr+KS6A==",
         "dependencies": {
-          "Microsoft.Extensions.DependencyInjection": "8.0.1",
-          "Microsoft.Extensions.Logging.Abstractions": "8.0.2",
-          "Microsoft.Extensions.Options": "8.0.2"
+          "Microsoft.Extensions.DependencyInjection": "9.0.19",
+          "Microsoft.Extensions.Logging.Abstractions": "9.0.19",
+          "Microsoft.Extensions.Options": "9.0.19"
         }
       },
       "Microsoft.Extensions.Logging.Abstractions": {
         "type": "Transitive",
-        "resolved": "8.0.2",
-        "contentHash": "nroMDjS7hNBPtkZqVBbSiQaQjWRDxITI8Y7XnDs97rqG3EbzVTNLZQf7bIeUJcaHOV8bca47s1Uxq94+2oGdxA==",
+        "resolved": "9.0.19",
+        "contentHash": "RpqMVoZ+NECJxLOZRjWOfjST0mULs4wb848mxG/CS9SMkVL6yi1sSIda4dGcsB01J2jUFd8hNwsaYl1gplU+Cw==",
         "dependencies": {
-          "Microsoft.Extensions.DependencyInjection.Abstractions": "8.0.2"
+          "Microsoft.Extensions.DependencyInjection.Abstractions": "9.0.19",
+          "System.Diagnostics.DiagnosticSource": "9.0.19"
         }
       },
       "Microsoft.Extensions.Logging.Configuration": {
@@ -400,11 +403,11 @@
       },
       "Microsoft.Extensions.Options": {
         "type": "Transitive",
-        "resolved": "8.0.2",
-        "contentHash": "dWGKvhFybsaZpGmzkGCbNNwBD1rVlWzrZKANLW/CcbFJpCEceMCGzT7zZwHOGBCbwM0SzBuceMj5HN1LKV1QqA==",
+        "resolved": "9.0.19",
+        "contentHash": "FdPZy4kUSwFlIVZ3EkK9fdHw2RfblUwzflSb4kjVeGf9v2lX9IH+q2RGUovYMR7CVfKMc2y2Db/bZ2b4yiMfOg==",
         "dependencies": {
-          "Microsoft.Extensions.DependencyInjection.Abstractions": "8.0.0",
-          "Microsoft.Extensions.Primitives": "8.0.0"
+          "Microsoft.Extensions.DependencyInjection.Abstractions": "9.0.19",
+          "Microsoft.Extensions.Primitives": "9.0.19"
         }
       },
       "Microsoft.Extensions.Options.ConfigurationExtensions": {
@@ -421,8 +424,8 @@
       },
       "Microsoft.Extensions.Primitives": {
         "type": "Transitive",
-        "resolved": "8.0.0",
-        "contentHash": "bXJEZrW9ny8vjMF1JV253WeLhpEVzFo1lyaZu1vQ4ZxWUlVvknZ/+ftFgVheLubb4eZPSwwxBeqS1JkCOjxd8g=="
+        "resolved": "9.0.19",
+        "contentHash": "9hIg8PQiMnpVFIsEHm25Wi1gBrPa2pS1G75uveyDUVLXrNKqBap9WGwQIgO0s6LUgRAOdsSYnbKbNC5b1G5Pcg=="
       },
       "Microsoft.IdentityModel.Abstractions": {
         "type": "Transitive",
@@ -551,6 +554,11 @@
         "resolved": "8.0.0",
         "contentHash": "AurL6Y5BA1WotzlEvVaIDpqzpIPvYnnldxru8oXJU2yFxFUy3+pNXjXd1ymO+RA0rq0+590Q8gaz2l3Sr7fmqg=="
       },
+      "System.Diagnostics.DiagnosticSource": {
+        "type": "Transitive",
+        "resolved": "9.0.19",
+        "contentHash": "UW+FCKPoM15boJwYTsWueNxTgUaqipnZx3z68khaWutVnbtjNpgl9WO7tCcmt7/x3eEYoXn6TZSoHyLwryJUAA=="
+      },
       "System.Diagnostics.EventLog": {
         "type": "Transitive",
         "resolved": "8.0.1",