diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 63e4dbb..536ef43 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -118,7 +118,27 @@ jobs:
         run: dotnet build backend/ProCoderJi.slnx --configuration Release --no-restore
 
       - name: Test backend
-        run: dotnet test backend/ProCoderJi.slnx --configuration Release --no-build
+        run: dotnet test backend/ProCoderJi.slnx --configuration Release --no-build --collect:"XPlat Code Coverage" --results-directory "$RUNNER_TEMP/backend-test-results"
+
+      - name: Verify API coverage collection
+        run: |
+          python3 - "$RUNNER_TEMP/backend-test-results" <<'PY'
+          import sys
+          import xml.etree.ElementTree as ET
+          from pathlib import Path
+
+          reports = list(Path(sys.argv[1]).rglob("coverage.cobertura.xml"))
+          covered = any(
+              int(line.get("hits", "0")) > 0
+              for report in reports
+              for package in ET.parse(report).findall("./packages/package")
+              if package.get("name") == "ProCoderJi.Api"
+              for line in package.findall(".//line")
+          )
+          if not covered:
+              raise SystemExit("Coverage collection did not record executed ProCoderJi.Api lines.")
+          print("Coverage collection recorded executed ProCoderJi.Api lines.")
+          PY
 
       - name: Verify PostgreSQL migrations
         # Validates the PostgreSQL schema path; Google sign-in needs separate live checks.
diff --git a/backend/tests/ProCoderJi.Api.Tests/ProCoderJi.Api.Tests.csproj b/backend/tests/ProCoderJi.Api.Tests/ProCoderJi.Api.Tests.csproj
index 8b6fd34..8550e9c 100644
--- a/backend/tests/ProCoderJi.Api.Tests/ProCoderJi.Api.Tests.csproj
+++ b/backend/tests/ProCoderJi.Api.Tests/ProCoderJi.Api.Tests.csproj
@@ -9,7 +9,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="coverlet.collector" Version="6.0.4" />
+    <PackageReference Include="coverlet.collector" Version="10.1.0" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="10.0.15" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.11.0" />
     <PackageReference Include="xunit" Version="2.9.3" />
diff --git a/backend/tests/ProCoderJi.Api.Tests/packages.lock.json b/backend/tests/ProCoderJi.Api.Tests/packages.lock.json
index 0a2f48d..fc79202 100644
--- a/backend/tests/ProCoderJi.Api.Tests/packages.lock.json
+++ b/backend/tests/ProCoderJi.Api.Tests/packages.lock.json
@@ -4,9 +4,9 @@
     "net10.0": {
       "coverlet.collector": {
         "type": "Direct",
-        "requested": "[6.0.4, )",
-        "resolved": "6.0.4",
-        "contentHash": "lkhqpF8Pu2Y7IiN7OntbsTtdbpR1syMsm2F3IgX6ootA4ffRqWL5jF7XipHuZQTdVuWG/gVAAcf8mjk8Tz0xPg=="
+        "requested": "[10.1.0, )",
+        "resolved": "10.1.0",
+        "contentHash": "SlYCIHnBYxINSUpR75SiM5JEmnx11pqT+Ac/C/fUqTTA0dLPl9eYzmFXKKuxmQhL3ZdTQl4PBD3YdAxAauaKLQ=="
       },
       "Microsoft.AspNetCore.Mvc.Testing": {
         "type": "Direct",
diff --git a/backend/tests/ProCoderJi.BrowserHost/packages.lock.json b/backend/tests/ProCoderJi.BrowserHost/packages.lock.json
index b8e6f4d..201c05c 100644
--- a/backend/tests/ProCoderJi.BrowserHost/packages.lock.json
+++ b/backend/tests/ProCoderJi.BrowserHost/packages.lock.json
@@ -24,8 +24,8 @@
       },
       "coverlet.collector": {
         "type": "Transitive",
-        "resolved": "6.0.4",
-        "contentHash": "lkhqpF8Pu2Y7IiN7OntbsTtdbpR1syMsm2F3IgX6ootA4ffRqWL5jF7XipHuZQTdVuWG/gVAAcf8mjk8Tz0xPg=="
+        "resolved": "10.1.0",
+        "contentHash": "SlYCIHnBYxINSUpR75SiM5JEmnx11pqT+Ac/C/fUqTTA0dLPl9eYzmFXKKuxmQhL3ZdTQl4PBD3YdAxAauaKLQ=="
       },
       "DnsClient": {
         "type": "Transitive",
@@ -455,7 +455,7 @@
           "Microsoft.AspNetCore.Mvc.Testing": "[10.0.15, )",
           "Microsoft.NET.Test.Sdk": "[18.11.0, )",
           "ProCoderJi.Api": "[1.0.0, )",
-          "coverlet.collector": "[6.0.4, )",
+          "coverlet.collector": "[10.1.0, )",
           "xunit": "[2.9.3, )",
           "xunit.runner.visualstudio": "[3.1.5, )"
         }