diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index cc1647b..b7281a4 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -45,15 +45,25 @@ jobs:
     - name: Install Dependencies
       run: |
         pip install -U pip
-        pip install -U wheel setuptools tox
+        pip install -U wheel setuptools tox coverage
     
     - name: Test
       run: tox -vv -p auto -f ${{ matrix.python.tox-prefix }} -- --cov-report=xml
       env:
         TOX_DISCOVER: "patch-for-windows-pypy3"
-    
-    - name: Upload coverage to Codecov
+        TOX_PARALLEL_NO_SPINNER: 1
+
+    - name: Combine Coverage
+      run: |
+        find . -name ".coverage.*" -exec mv {} ./ \;
+        coverage combine
+        coverage xml
+
+    - name: Upload Coverage to Codecov
       uses: codecov/codecov-action@v1
+      with:
+        files: coverage.xml
+        fail_ci_if_error: true
     
     - name: Lint
       run: tox -vv
diff --git a/tox.ini b/tox.ini
index ba80ad6..ae01c08 100644
--- a/tox.ini
+++ b/tox.ini
@@ -8,6 +8,9 @@ envlist =
 commands = pytest --cov {posargs}
 passenv =
     NEW_RELIC_LICENSE_KEY
+setenv =
+    COVERAGE_FILE={envdir}/.coverage.{envname}
+    COVERAGE_RCFILE={toxinidir}/tox.ini
 deps =
     # Base Dependencies
     pytest
@@ -30,3 +33,19 @@ commands = sphinx-build -d "{toxinidir}/docs_doctree" "{toxinidir}/docs/" "{toxi
 deps =
     sphinx<8
     sphinx_rtd_theme
+
+[coverage:run]
+branch = True
+source = newrelic_telemetry_sdk
+
+[coverage:paths]
+source =
+    src/newrelic_telemetry_sdk/
+    .tox/**/site-packages/newrelic_telemetry_sdk/
+    /__w/**/site-packages/newrelic_telemetry_sdk/
+
+[coverage:html]
+directory = ${TOX_ENV_DIR-.}/htmlcov
+
+[coverage:xml]
+output = ${TOX_ENV_DIR-.}/coverage.xml