diff --git a/templates/basic/.github/workflows/main.yml b/templates/basic/.github/workflows/main.yml
index 182554c6a..535e4b7c9 100644
--- a/templates/basic/.github/workflows/main.yml
+++ b/templates/basic/.github/workflows/main.yml
@@ -2,16 +2,22 @@ name: CI
 on: [push]
 jobs:
   build:
-    runs-on: ubuntu-latest
+    name: Build, lint, and test on Node ${{ matrix.node }} and ${{ matrix.os }}
+
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        node: ['10.x', '12.x', '14.x']
+        os: [ubuntu-latest, windows-latest, macOS-latest]
 
     steps:
-      - name: Begin CI...
+      - name: Checkout repo
         uses: actions/checkout@v2
 
-      - name: Use Node 12
+      - name: Use Node ${{ matrix.node }}
         uses: actions/setup-node@v1
         with:
-          node-version: 12.x
+          node-version: ${{ matrix.node }}
 
       - name: Install deps and build (with cache)
         uses: bahmutov/npm-install@v1
diff --git a/templates/basic/README.md b/templates/basic/README.md
index 0e115bfd2..93eb55df4 100644
--- a/templates/basic/README.md
+++ b/templates/basic/README.md
@@ -63,7 +63,7 @@ TSDX uses [Rollup](https://rollupjs.org) as a bundler and generates multiple rol
 
 Two actions are added by default:
 
-- `main` which installs deps w/ cache, lints, tests, and builds on all pushes
+- `main` which installs deps w/ cache, lints, tests, and builds on all pushes against a Node and OS matrix
 - `size` which comments cost comparison of your library on every pull request using [`size-limit`](https://github.com/ai/size-limit)
 
 ## Optimizations
diff --git a/templates/react-with-storybook/.github/workflows/main.yml b/templates/react-with-storybook/.github/workflows/main.yml
index 182554c6a..535e4b7c9 100644
--- a/templates/react-with-storybook/.github/workflows/main.yml
+++ b/templates/react-with-storybook/.github/workflows/main.yml
@@ -2,16 +2,22 @@ name: CI
 on: [push]
 jobs:
   build:
-    runs-on: ubuntu-latest
+    name: Build, lint, and test on Node ${{ matrix.node }} and ${{ matrix.os }}
+
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        node: ['10.x', '12.x', '14.x']
+        os: [ubuntu-latest, windows-latest, macOS-latest]
 
     steps:
-      - name: Begin CI...
+      - name: Checkout repo
         uses: actions/checkout@v2
 
-      - name: Use Node 12
+      - name: Use Node ${{ matrix.node }}
         uses: actions/setup-node@v1
         with:
-          node-version: 12.x
+          node-version: ${{ matrix.node }}
 
       - name: Install deps and build (with cache)
         uses: bahmutov/npm-install@v1
diff --git a/templates/react-with-storybook/README.md b/templates/react-with-storybook/README.md
index f5e0dd69a..134273f32 100644
--- a/templates/react-with-storybook/README.md
+++ b/templates/react-with-storybook/README.md
@@ -103,7 +103,7 @@ TSDX uses [Rollup](https://rollupjs.org) as a bundler and generates multiple rol
 
 Two actions are added by default:
 
-- `main` which runs installs deps w/ cache, lints, tests, and builds on all pushes
+- `main` which installs deps w/ cache, lints, tests, and builds on all pushes against a Node and OS matrix
 - `size` which comments cost comparison of your library on every pull request using [size-limit](https://github.com/ai/size-limit)
 
 ## Optimizations
diff --git a/templates/react/.github/workflows/main.yml b/templates/react/.github/workflows/main.yml
index 182554c6a..535e4b7c9 100644
--- a/templates/react/.github/workflows/main.yml
+++ b/templates/react/.github/workflows/main.yml
@@ -2,16 +2,22 @@ name: CI
 on: [push]
 jobs:
   build:
-    runs-on: ubuntu-latest
+    name: Build, lint, and test on Node ${{ matrix.node }} and ${{ matrix.os }}
+
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        node: ['10.x', '12.x', '14.x']
+        os: [ubuntu-latest, windows-latest, macOS-latest]
 
     steps:
-      - name: Begin CI...
+      - name: Checkout repo
         uses: actions/checkout@v2
 
-      - name: Use Node 12
+      - name: Use Node ${{ matrix.node }}
         uses: actions/setup-node@v1
         with:
-          node-version: 12.x
+          node-version: ${{ matrix.node }}
 
       - name: Install deps and build (with cache)
         uses: bahmutov/npm-install@v1
diff --git a/templates/react/README.md b/templates/react/README.md
index 1f020dd28..1db53ccd9 100644
--- a/templates/react/README.md
+++ b/templates/react/README.md
@@ -82,8 +82,8 @@ TSDX uses [Rollup](https://rollupjs.org) as a bundler and generates multiple rol
 
 Two actions are added by default:
 
-- `main` which runs installs deps w/ cache, lints, tests, and builds on all pushes
-- `size` which comments cost comparison of your library on every pull request using
+- `main` which installs deps w/ cache, lints, tests, and builds on all pushes against a Node and OS matrix
+- `size` which comments cost comparison of your library on every pull request using [`size-limit`](https://github.com/ai/size-limit)
 
 ## Optimizations