diff --git a/.github/codecov.yml b/.github/codecov.yml
new file mode 100644
index 0000000..c203f26
--- /dev/null
+++ b/.github/codecov.yml
@@ -0,0 +1,27 @@
+# This is the configuration for codecov.yml -- remember to validate it.
+#
+# cat .github/codecov.yml | curl --data-binary @- https://codecov.io/validate
+
+codecov:
+  notify:
+    wait_for_ci: false
+  require_ci_to_pass: false
+
+coverage:
+  status:
+    patch:
+      default:
+        target: 95%
+    project:
+      default: false
+      docstringify:
+        target: 95%
+        paths:
+          - "!tests/.*"
+      tests:
+        target: 100%
+        paths:
+          - "tests/.*"
+
+comment:
+  layout: "reach, diff, files"
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1b04030..067abb5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,4 +1,4 @@
-# This workflow builds docstringify on Mac, Linux, and Windows for
+# This workflow builds Docstringify on Mac, Linux, and Windows for
 # multiple versions of Python to confirm it can be properly installed.
 #
 # Based on https://github.com/stefmolin/data-morph/blob/main/.github/workflows/ci.yml
@@ -66,4 +66,12 @@ jobs:
         run: python -m pip install --group dev
 
       - name: Validate pre-commit hook
-        run: pre-commit try-repo . docstringify
+        run: pre-commit try-repo . docstringify --all-files
+
+      - name: Run tests
+        run: pytest
+
+      - name: Upload coverage reports to Codecov
+        uses: codecov/codecov-action@13ce06bfc6bbe3ecf90edbbf1bc32fe5978ca1d3  # v5.3.1
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
diff --git a/.github/workflows/codecov-validate.yml b/.github/workflows/codecov-validate.yml
new file mode 100644
index 0000000..1e2ee5e
--- /dev/null
+++ b/.github/workflows/codecov-validate.yml
@@ -0,0 +1,34 @@
+# This workflow checks that the codecov.yml file is valid, if it is included in the PR.
+#
+# Author: Stefanie Molin
+
+name: Validate codecov config
+
+on:
+  pull_request:
+    paths:
+      - '.github/codecov.yml'
+  schedule:
+    - cron: '21 21 21 * *'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  # check that the codecov.yml configuration is valid
+  codecov:
+    runs-on: ubuntu-latest
+    name: Validate codecov.yml
+    steps:
+      - name: Checkout Code
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683  # v4.2.2
+        with:
+          fetch-depth: 0
+      - name: Validate with codecov API
+        run: |
+          response=$(cat .github/codecov.yml | curl --data-binary @- https://codecov.io/validate)
+          echo $response
+          if [[ $response = Error* ]]; then
+            exit 1
+          fi