diff --git a/.github/workflows/continuous-integration.yml b/.github/workflows/continuous-integration.yml
index 54f2a2c..cc8e0ad 100644
--- a/.github/workflows/continuous-integration.yml
+++ b/.github/workflows/continuous-integration.yml
@@ -154,11 +154,13 @@ jobs:
       - name: "List all coverage reports"
         run: echo coverage_reports=./coverage/$(ls -m coverage/ | sed "s/, */,.\/coverage\//g") >> $GITHUB_ENV
 
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v4
         with:
           files: ./coverage.xml,${{ env.coverage_reports }}
           fail_ci_if_error: true
           verbose: true
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
 
   analysis:
     name: "Static Analysis"
diff --git a/composer.json b/composer.json
index 16db14d..6c7d076 100644
--- a/composer.json
+++ b/composer.json
@@ -46,7 +46,11 @@
     "autoload-dev": {
         "psr-4": {
             "Churn\\Tests\\": "tests"
-        }
+        },
+        "exclude-from-classmap": [
+            "/tests/Unit/Assets",
+            "/tests/Unit/Assets2"
+        ]
     },
     "bin": [
         "bin/churn"
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 01e06e4..85baba3 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -25,5 +25,6 @@
     </coverage>
     <php>
         <env name="SYMFONY_PHPUNIT_REMOVE_RETURN_TYPEHINT" value="1" />
+        <env name="SYMFONY_PHPUNIT_REQUIRE" value="nikic/php-parser:^4.19"/>
     </php>
 </phpunit>