diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 00000000000..36bff04a744
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,22 @@
+name: ci
+
+on:
+  pull_request:
+    branches: [main]
+
+jobs:
+  tests:
+    name: Tests
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: "1.23"
+
+      - name: Run go tests
+        run: go test -cover ./...
diff --git a/README.md b/README.md
index c2bec0368b7..1ca1f3cb746 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
+![CI](https://github.com/sadodk/learn-cicd-starter/actions/workflows/ci.yml/badge.svg)
+
 # learn-cicd-starter (Notely)
 
 This repo contains the starter code for the "Notely" application for the "Learn CICD" course on [Boot.dev](https://boot.dev).
@@ -18,6 +20,7 @@ Run the server:
 go build -o notely && ./notely
 ```
 
-*This starts the server in non-database mode.* It will serve a simple webpage at `http://localhost:8080`.
+_This starts the server in non-database mode._ It will serve a simple webpage at `http://localhost:8080`.
 
-You do *not* need to set up a database or any interactivity on the webpage yet. Instructions for that will come later in the course!
+You do _not_ need to set up a database or any interactivity on the webpage yet. Instructions for that will come later in the course!
+Saads's version of Boot.dev's Notely app
diff --git a/internal/auth/auth_test.go b/internal/auth/auth_test.go
new file mode 100644
index 00000000000..0621dce1521
--- /dev/null
+++ b/internal/auth/auth_test.go
@@ -0,0 +1,60 @@
+package auth
+
+import (
+	"net/http"
+	"testing"
+)
+
+func TestGetAPIKey(t *testing.T) {
+	tests := []struct {
+		name       string
+		headers    http.Header
+		wantKey    string
+		wantErr    error
+		wantErrMsg string
+	}{
+		{
+			name:    "valid API key",
+			headers: http.Header{"Authorization": []string{"ApiKey my-secret-key"}},
+			wantKey: "my-secret-key",
+			wantErr: nil,
+		},
+		{
+			name:    "no authorization header",
+			headers: http.Header{},
+			wantKey: "",
+			wantErr: ErrNoAuthHeaderIncluded,
+		},
+		{
+			name:       "malformed header - wrong prefix",
+			headers:    http.Header{"Authorization": []string{"Bearer my-token"}},
+			wantKey:    "",
+			wantErrMsg: "malformed authorization header",
+		},
+		{
+			name:       "malformed header - no space",
+			headers:    http.Header{"Authorization": []string{"ApiKey"}},
+			wantKey:    "",
+			wantErrMsg: "malformed authorization header",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			gotKey, gotErr := GetAPIKey(tt.headers)
+			if gotKey != tt.wantKey {
+				t.Errorf("GetAPIKey() key = %q, want %q", gotKey, tt.wantKey)
+			}
+			if tt.wantErr != nil {
+				if gotErr != tt.wantErr {
+					t.Errorf("GetAPIKey() error = %v, want %v", gotErr, tt.wantErr)
+				}
+			} else if tt.wantErrMsg != "" {
+				if gotErr == nil || gotErr.Error() != tt.wantErrMsg {
+					t.Errorf("GetAPIKey() error = %v, want error with message %q", gotErr, tt.wantErrMsg)
+				}
+			} else if gotErr != nil {
+				t.Errorf("GetAPIKey() unexpected error = %v", gotErr)
+			}
+		})
+	}
+}