diff --git a/.github/workflows/nodejs-test.yml b/.github/workflows/nodejs-test.yml
index 1f948228e..029a58e23 100644
--- a/.github/workflows/nodejs-test.yml
+++ b/.github/workflows/nodejs-test.yml
@@ -6,9 +6,13 @@ on:
             - 'dependabot/**'
     pull_request:
 
+permissions:
+    contents: read
+
 env:
     CI: true
     FORCE_COLOR: 2
+    NODE_COV: 16 # The Node.js version to run coveralls on
 
 jobs:
     lint:
@@ -27,14 +31,17 @@ jobs:
     test:
         name: Node ${{ matrix.node }}
         runs-on: ubuntu-latest
+        permissions:
+            checks: write # for coverallsapp/github-action to create new checks
+            contents: read # for actions/checkout to fetch code
 
         strategy:
             fail-fast: false
             matrix:
                 node:
-                    - 12
                     - 14
                     - 16
+                    - 18
                     - lts/*
 
         steps:
@@ -52,3 +59,15 @@ jobs:
 
             - name: Run Tests
               run: npm run unit-tests
+              if: matrix.node != env.NODE_COV
+
+            - name: Run Jest with coverage
+              run: npm run unit-tests -- --coverage
+              if: matrix.node == env.NODE_COV
+
+            - name: Run Coveralls
+              uses: coverallsapp/github-action@1.1.3
+              if: matrix.node == env.NODE_COV
+              continue-on-error: true
+              with:
+                  github-token: '${{ secrets.GITHUB_TOKEN }}'
diff --git a/.gitignore b/.gitignore
index faaca9753..44961c3bb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,8 +3,7 @@
 .vscode
 node_modules
 docs/build
-docs/05_api_reference.md
 packages/*/dist/
 test/dist/
-.DS_Store
 tsconfig.tsbuildinfo
+coverage/