diff --git a/Directory.Packages.props b/Directory.Packages.props
index b13812f..04e75e3 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -18,7 +18,7 @@
 
     <!-- xunit.v3 3.2.2 is what Avalonia.Headless.XUnit 12.1.4 is built against; every test
          project shares the one stack so the headless and plain tests run the same way. -->
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.9.0" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.11.0" />
     <PackageVersion Include="coverlet.collector" Version="10.1.0" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.5" />
     <PackageVersion Include="xunit.v3" Version="3.2.2" />
diff --git a/tests/Freizeichen.App.Tests/packages.lock.json b/tests/Freizeichen.App.Tests/packages.lock.json
index cb7c786..a2c41a9 100644
--- a/tests/Freizeichen.App.Tests/packages.lock.json
+++ b/tests/Freizeichen.App.Tests/packages.lock.json
@@ -41,12 +41,12 @@
       },
       "Microsoft.NET.Test.Sdk": {
         "type": "Direct",
-        "requested": "[18.9.0, )",
-        "resolved": "18.9.0",
-        "contentHash": "xIzVXa/VpKXqDWzyC/5Hw8JbFY5u9k3Jc53CpcjBiOXvkQGio484LD9FNwOiGUSMDcYL3Rcw9sNgGi5WrswlPQ==",
+        "requested": "[18.11.0, )",
+        "resolved": "18.11.0",
+        "contentHash": "xf/bR0LNkhK0SnadDRlZIQmC4sac5Wk0e1WAdiQjRN3MSo6gQ9M2c4c1XRNnVGjfOvckh704W5CJ19AL0/Xsdg==",
         "dependencies": {
-          "Microsoft.CodeCoverage": "18.9.0",
-          "Microsoft.TestPlatform.TestHost": "18.9.0"
+          "Microsoft.CodeCoverage": "18.11.0",
+          "Microsoft.TestPlatform.TestHost": "18.11.0"
         }
       },
       "StyleCop.Analyzers": {
@@ -208,8 +208,8 @@
       },
       "Microsoft.CodeCoverage": {
         "type": "Transitive",
-        "resolved": "18.9.0",
-        "contentHash": "MtegCIKGuG0r/LCdIjoR1HgzCGIUBhR3aNdbtQpts5vMXQuqBDZ2Jsd2uFKoHFM2XrQV6ZrDf3F5oLi3SLTp8w=="
+        "resolved": "18.11.0",
+        "contentHash": "MhN9wpvL1Es4hfIYslrsVgIsUdDFxuOBTbAl9mGIMvFo8PP5CLf4DrGdNrfwWSyn0lqi6sssm+I/qkkLL3MU+g=="
       },
       "Microsoft.Testing.Extensions.Telemetry": {
         "type": "Transitive",
@@ -243,15 +243,15 @@
       },
       "Microsoft.TestPlatform.ObjectModel": {
         "type": "Transitive",
-        "resolved": "18.9.0",
-        "contentHash": "Fz/qXC52VXXopzHj7v2reCKcCqSxkTDCkEDfkNAH0vni/7qK/KLMiEYtRmnUanxO2F2g2zZZ60qCpxF0AF7URA=="
+        "resolved": "18.11.0",
+        "contentHash": "BXBHYnwSOljKute8UYCMXOLAdB7awxEMppPSpqOF1ZxLD/W/OH+vTBgFaXA7q0aditJTVXSMVenel+wOkEIyNg=="
       },
       "Microsoft.TestPlatform.TestHost": {
         "type": "Transitive",
-        "resolved": "18.9.0",
-        "contentHash": "Oq+Pma/J86aZL72t71bcESvDszDsTjUfl6PIsuDdPoKTHZfNMhKamCfLD5fKx51W/u0KozXtJo2/3fnt0sgPxg==",
+        "resolved": "18.11.0",
+        "contentHash": "AKjwKpyRBwoQFQmpcchtoYlfJEBlaY/40uxBRi+qXP4NR7xT8t+XTJtOyEyumfvfJcH5pASs75LwNdXYRr4XNA==",
         "dependencies": {
-          "Microsoft.TestPlatform.ObjectModel": "18.9.0"
+          "Microsoft.TestPlatform.ObjectModel": "18.11.0"
         }
       },
       "Microsoft.Win32.Registry": {
diff --git a/tests/Freizeichen.AppLogic.Tests/packages.lock.json b/tests/Freizeichen.AppLogic.Tests/packages.lock.json
index fdcbab4..ad26742 100644
--- a/tests/Freizeichen.AppLogic.Tests/packages.lock.json
+++ b/tests/Freizeichen.AppLogic.Tests/packages.lock.json
@@ -16,12 +16,12 @@
       },
       "Microsoft.NET.Test.Sdk": {
         "type": "Direct",
-        "requested": "[18.9.0, )",
-        "resolved": "18.9.0",
-        "contentHash": "xIzVXa/VpKXqDWzyC/5Hw8JbFY5u9k3Jc53CpcjBiOXvkQGio484LD9FNwOiGUSMDcYL3Rcw9sNgGi5WrswlPQ==",
+        "requested": "[18.11.0, )",
+        "resolved": "18.11.0",
+        "contentHash": "xf/bR0LNkhK0SnadDRlZIQmC4sac5Wk0e1WAdiQjRN3MSo6gQ9M2c4c1XRNnVGjfOvckh704W5CJ19AL0/Xsdg==",
         "dependencies": {
-          "Microsoft.CodeCoverage": "18.9.0",
-          "Microsoft.TestPlatform.TestHost": "18.9.0"
+          "Microsoft.CodeCoverage": "18.11.0",
+          "Microsoft.TestPlatform.TestHost": "18.11.0"
         }
       },
       "StyleCop.Analyzers": {
@@ -60,8 +60,8 @@
       },
       "Microsoft.CodeCoverage": {
         "type": "Transitive",
-        "resolved": "18.9.0",
-        "contentHash": "MtegCIKGuG0r/LCdIjoR1HgzCGIUBhR3aNdbtQpts5vMXQuqBDZ2Jsd2uFKoHFM2XrQV6ZrDf3F5oLi3SLTp8w=="
+        "resolved": "18.11.0",
+        "contentHash": "MhN9wpvL1Es4hfIYslrsVgIsUdDFxuOBTbAl9mGIMvFo8PP5CLf4DrGdNrfwWSyn0lqi6sssm+I/qkkLL3MU+g=="
       },
       "Microsoft.Testing.Extensions.Telemetry": {
         "type": "Transitive",
@@ -95,15 +95,15 @@
       },
       "Microsoft.TestPlatform.ObjectModel": {
         "type": "Transitive",
-        "resolved": "18.9.0",
-        "contentHash": "Fz/qXC52VXXopzHj7v2reCKcCqSxkTDCkEDfkNAH0vni/7qK/KLMiEYtRmnUanxO2F2g2zZZ60qCpxF0AF7URA=="
+        "resolved": "18.11.0",
+        "contentHash": "BXBHYnwSOljKute8UYCMXOLAdB7awxEMppPSpqOF1ZxLD/W/OH+vTBgFaXA7q0aditJTVXSMVenel+wOkEIyNg=="
       },
       "Microsoft.TestPlatform.TestHost": {
         "type": "Transitive",
-        "resolved": "18.9.0",
-        "contentHash": "Oq+Pma/J86aZL72t71bcESvDszDsTjUfl6PIsuDdPoKTHZfNMhKamCfLD5fKx51W/u0KozXtJo2/3fnt0sgPxg==",
+        "resolved": "18.11.0",
+        "contentHash": "AKjwKpyRBwoQFQmpcchtoYlfJEBlaY/40uxBRi+qXP4NR7xT8t+XTJtOyEyumfvfJcH5pASs75LwNdXYRr4XNA==",
         "dependencies": {
-          "Microsoft.TestPlatform.ObjectModel": "18.9.0"
+          "Microsoft.TestPlatform.ObjectModel": "18.11.0"
         }
       },
       "Microsoft.Win32.Registry": {
diff --git a/tests/Freizeichen.Domain.Tests/packages.lock.json b/tests/Freizeichen.Domain.Tests/packages.lock.json
index 3817e38..377177a 100644
--- a/tests/Freizeichen.Domain.Tests/packages.lock.json
+++ b/tests/Freizeichen.Domain.Tests/packages.lock.json
@@ -10,12 +10,12 @@
       },
       "Microsoft.NET.Test.Sdk": {
         "type": "Direct",
-        "requested": "[18.9.0, )",
-        "resolved": "18.9.0",
-        "contentHash": "xIzVXa/VpKXqDWzyC/5Hw8JbFY5u9k3Jc53CpcjBiOXvkQGio484LD9FNwOiGUSMDcYL3Rcw9sNgGi5WrswlPQ==",
+        "requested": "[18.11.0, )",
+        "resolved": "18.11.0",
+        "contentHash": "xf/bR0LNkhK0SnadDRlZIQmC4sac5Wk0e1WAdiQjRN3MSo6gQ9M2c4c1XRNnVGjfOvckh704W5CJ19AL0/Xsdg==",
         "dependencies": {
-          "Microsoft.CodeCoverage": "18.9.0",
-          "Microsoft.TestPlatform.TestHost": "18.9.0"
+          "Microsoft.CodeCoverage": "18.11.0",
+          "Microsoft.TestPlatform.TestHost": "18.11.0"
         }
       },
       "StyleCop.Analyzers": {
@@ -54,8 +54,8 @@
       },
       "Microsoft.CodeCoverage": {
         "type": "Transitive",
-        "resolved": "18.9.0",
-        "contentHash": "MtegCIKGuG0r/LCdIjoR1HgzCGIUBhR3aNdbtQpts5vMXQuqBDZ2Jsd2uFKoHFM2XrQV6ZrDf3F5oLi3SLTp8w=="
+        "resolved": "18.11.0",
+        "contentHash": "MhN9wpvL1Es4hfIYslrsVgIsUdDFxuOBTbAl9mGIMvFo8PP5CLf4DrGdNrfwWSyn0lqi6sssm+I/qkkLL3MU+g=="
       },
       "Microsoft.Testing.Extensions.Telemetry": {
         "type": "Transitive",
@@ -89,15 +89,15 @@
       },
       "Microsoft.TestPlatform.ObjectModel": {
         "type": "Transitive",
-        "resolved": "18.9.0",
-        "contentHash": "Fz/qXC52VXXopzHj7v2reCKcCqSxkTDCkEDfkNAH0vni/7qK/KLMiEYtRmnUanxO2F2g2zZZ60qCpxF0AF7URA=="
+        "resolved": "18.11.0",
+        "contentHash": "BXBHYnwSOljKute8UYCMXOLAdB7awxEMppPSpqOF1ZxLD/W/OH+vTBgFaXA7q0aditJTVXSMVenel+wOkEIyNg=="
       },
       "Microsoft.TestPlatform.TestHost": {
         "type": "Transitive",
-        "resolved": "18.9.0",
-        "contentHash": "Oq+Pma/J86aZL72t71bcESvDszDsTjUfl6PIsuDdPoKTHZfNMhKamCfLD5fKx51W/u0KozXtJo2/3fnt0sgPxg==",
+        "resolved": "18.11.0",
+        "contentHash": "AKjwKpyRBwoQFQmpcchtoYlfJEBlaY/40uxBRi+qXP4NR7xT8t+XTJtOyEyumfvfJcH5pASs75LwNdXYRr4XNA==",
         "dependencies": {
-          "Microsoft.TestPlatform.ObjectModel": "18.9.0"
+          "Microsoft.TestPlatform.ObjectModel": "18.11.0"
         }
       },
       "Microsoft.Win32.Registry": {
diff --git a/tests/Freizeichen.Modem.Tests/packages.lock.json b/tests/Freizeichen.Modem.Tests/packages.lock.json
index 49b51fa..e154f5b 100644
--- a/tests/Freizeichen.Modem.Tests/packages.lock.json
+++ b/tests/Freizeichen.Modem.Tests/packages.lock.json
@@ -16,12 +16,12 @@
       },
       "Microsoft.NET.Test.Sdk": {
         "type": "Direct",
-        "requested": "[18.9.0, )",
-        "resolved": "18.9.0",
-        "contentHash": "xIzVXa/VpKXqDWzyC/5Hw8JbFY5u9k3Jc53CpcjBiOXvkQGio484LD9FNwOiGUSMDcYL3Rcw9sNgGi5WrswlPQ==",
+        "requested": "[18.11.0, )",
+        "resolved": "18.11.0",
+        "contentHash": "xf/bR0LNkhK0SnadDRlZIQmC4sac5Wk0e1WAdiQjRN3MSo6gQ9M2c4c1XRNnVGjfOvckh704W5CJ19AL0/Xsdg==",
         "dependencies": {
-          "Microsoft.CodeCoverage": "18.9.0",
-          "Microsoft.TestPlatform.TestHost": "18.9.0"
+          "Microsoft.CodeCoverage": "18.11.0",
+          "Microsoft.TestPlatform.TestHost": "18.11.0"
         }
       },
       "StyleCop.Analyzers": {
@@ -60,8 +60,8 @@
       },
       "Microsoft.CodeCoverage": {
         "type": "Transitive",
-        "resolved": "18.9.0",
-        "contentHash": "MtegCIKGuG0r/LCdIjoR1HgzCGIUBhR3aNdbtQpts5vMXQuqBDZ2Jsd2uFKoHFM2XrQV6ZrDf3F5oLi3SLTp8w=="
+        "resolved": "18.11.0",
+        "contentHash": "MhN9wpvL1Es4hfIYslrsVgIsUdDFxuOBTbAl9mGIMvFo8PP5CLf4DrGdNrfwWSyn0lqi6sssm+I/qkkLL3MU+g=="
       },
       "Microsoft.Testing.Extensions.Telemetry": {
         "type": "Transitive",
@@ -95,15 +95,15 @@
       },
       "Microsoft.TestPlatform.ObjectModel": {
         "type": "Transitive",
-        "resolved": "18.9.0",
-        "contentHash": "Fz/qXC52VXXopzHj7v2reCKcCqSxkTDCkEDfkNAH0vni/7qK/KLMiEYtRmnUanxO2F2g2zZZ60qCpxF0AF7URA=="
+        "resolved": "18.11.0",
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       },
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+        "resolved": "18.11.0",
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         "dependencies": {
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+          "Microsoft.TestPlatform.ObjectModel": "18.11.0"
         }
       },
       "Microsoft.Win32.Registry": {