diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..e168080
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,28 @@
+name: CI
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+
+      - name: Verify gofmt
+        run: |
+          unformatted=$(gofmt -l .)
+          if [ -n "$unformatted" ]; then
+            echo "The following files are not gofmt'd:"
+            echo "$unformatted"
+            exit 1
+          fi
+
+      - name: Test
+        run: go test -v ./...
diff --git a/go.mod b/go.mod
index f936e51..e8db3f0 100644
--- a/go.mod
+++ b/go.mod
@@ -1,9 +1,12 @@
 module github.com/sfreiberg/progress
 
-go 1.12
+go 1.26
+
+require github.com/nlopes/slack v0.5.0
 
 require (
 	github.com/gorilla/websocket v1.4.0 // indirect
-	github.com/nlopes/slack v0.5.0
+	github.com/lusis/slack-test v0.0.0-20190426140909-c40012f20018 // indirect
 	github.com/pkg/errors v0.8.1 // indirect
+	github.com/stretchr/testify v1.12.1 // indirect
 )
diff --git a/go.sum b/go.sum
index 771062f..36e0239 100644
--- a/go.sum
+++ b/go.sum
@@ -1,6 +1,12 @@
 github.com/gorilla/websocket v1.4.0 h1:WDFjx/TMzVgy9VdMMQi2K2Emtwi2QcUQsztZ/zLaH/Q=
 github.com/gorilla/websocket v1.4.0/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
+github.com/lusis/slack-test v0.0.0-20190426140909-c40012f20018 h1:MNApn+Z+fIT4NPZopPfCc1obT6aY3SVM6DOctz1A9ZU=
+github.com/lusis/slack-test v0.0.0-20190426140909-c40012f20018/go.mod h1:sFlOUpQL1YcjhFVXhg1CG8ZASEs/Mf1oVb6H75JL/zg=
 github.com/nlopes/slack v0.5.0 h1:NbIae8Kd0NpqaEI3iUrsuS0KbcEDhzhc939jLW5fNm0=
 github.com/nlopes/slack v0.5.0/go.mod h1:jVI4BBK3lSktibKahxBF74txcK2vyvkza1z/+rRnVAM=
 github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/stretchr/testify v1.12.1 h1:EuwCh5fleGS7H32xRwO3wRGT7DxrDhLAT6FF8MpWDWE=
+github.com/stretchr/testify v1.12.1/go.mod h1:MDEgiDPPsNp5cuIrHPPCyornHKgEVbtFUmoNlxoYthg=
+go.yaml.in/yaml/v3 v3.0.5 h1:N6y/pJk8buWs9NY5ERU2HSMfm+IuD/OtfdAnq6kESPw=
+go.yaml.in/yaml/v3 v3.0.5/go.mod h1:HVTZu1O7/Vkt2N+BFy8Zza+lnLsABggaTM2ZpNIGuKg=
diff --git a/progress_test.go b/progress_test.go
index 8779692..042885d 100644
--- a/progress_test.go
+++ b/progress_test.go
@@ -15,7 +15,7 @@ func TestProgressBar(t *testing.T) {
 	)
 
 	if token == "" || channel == "" {
-		t.Fatalf("You must set the SLACK_TOKEN and SLACK_CHANNEL environment variables.")
+		t.Skip("SLACK_TOKEN and SLACK_CHANNEL not set; skipping integration test.")
 	}
 
 	pbar := progress.New(token, channel, nil)