diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index e655dfc..d700666 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -8,17 +8,6 @@ permissions:
 env:
   GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
 jobs:
-  Test:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v3
-    - uses: actions/setup-go@v3
-      with:
-        go-version: '1.20'
-    - run: |
-        go mod tidy
-        go test
-      working-directory: core
   BuildExe:
     runs-on: windows-latest
     steps:
diff --git a/.github/workflows/clean.yaml b/.github/workflows/clean.yaml
new file mode 100644
index 0000000..cc2d8f8
--- /dev/null
+++ b/.github/workflows/clean.yaml
@@ -0,0 +1,22 @@
+name: clean
+on:
+  push:
+    branches:
+    - master
+  pull_request:
+    branches:
+    - master
+jobs:
+  Test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - uses: actions/setup-go@v3
+      with:
+        go-version: '1.20'
+    - run: |
+        test -z `gofmt -l .`
+    - run: |
+        go mod tidy
+        go test
+      working-directory: core
diff --git a/README.md b/README.md
index 8ee259b..a21b7b6 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,7 @@ CW4ISR
 ![image](https://img.shields.io/badge/Go-1.20-red.svg)
 ![image](https://img.shields.io/badge/license-MIT-darkblue.svg)
 ![badge](https://github.com/nextzlog/cw4i/actions/workflows/build.yaml/badge.svg)
+![badge](https://github.com/nextzlog/cw4i/actions/workflows/clean.yaml/badge.svg)
 
 CW4ISR is a highly programmable Morse Decoder that assists automated amateur radio operations.