diff --git a/tests/test_github.py b/tests/test_github.py
index 30158e5..fed01d7 100644
--- a/tests/test_github.py
+++ b/tests/test_github.py
@@ -8,27 +8,31 @@ import nio
 from .start import BOT_URL, FULL_ID, MATRIX_ID, MATRIX_PW, MATRIX_URL
 
 SHA256 = "fd7522672889385736be8ffc86d1f8de2e15668864f49af729b5c63e5e0698c4"
-EXAMPLE_GITHUB_REQUEST_HEADERS = {
-    # 'Request URL': 'https://bot.saurel.me/room?formatter=github',
-    # 'Request method': 'POST',
-    "Accept": "*/*",
-    "content-type": "application/json",
-    "User-Agent": "GitHub-Hookshot/8d33975",
-    "X-GitHub-Delivery": "636b9b1c-0761-11ec-8a8a-5e435c5ac4f4",
-    "X-GitHub-Event": "push",
-    "X-GitHub-Hook-ID": "311845633",
-    "X-GitHub-Hook-Installation-Target-ID": "171114171",
-    "X-GitHub-Hook-Installation-Target-Type": "repository",
-    "X-Hub-Signature": "sha1=ea68fdfcb2f328aaa8f50d176f355e5d4fc95d94",
-    "X-Hub-Signature-256": f"sha256={SHA256}",
-}
+
+
+def headers(sha256=SHA256, event="push"):
+    """Mock headers from github webhooks."""
+    return {
+        # 'Request URL': 'https://bot.saurel.me/room?formatter=github',
+        # 'Request method': 'POST',
+        "Accept": "*/*",
+        "content-type": "application/json",
+        "User-Agent": "GitHub-Hookshot/8d33975",
+        "X-GitHub-Delivery": "636b9b1c-0761-11ec-8a8a-5e435c5ac4f4",
+        "X-GitHub-Event": event,
+        "X-GitHub-Hook-ID": "311845633",
+        "X-GitHub-Hook-Installation-Target-ID": "171114171",
+        "X-GitHub-Hook-Installation-Target-Type": "repository",
+        "X-Hub-Signature": "sha1=ea68fdfcb2f328aaa8f50d176f355e5d4fc95d94",
+        "X-Hub-Signature-256": f"sha256={sha256}",
+    }
 
 
 class GithubFormatterTest(unittest.IsolatedAsyncioTestCase):
     """Github formatter test class."""
 
-    async def test_github_body(self):
-        """Send a markdown message, and check the result."""
+    async def test_github_notification(self):
+        """Send a mock github webhook, and check the result."""
         messages = []
         client = nio.AsyncClient(MATRIX_URL, MATRIX_ID)
 
@@ -37,7 +41,6 @@ class GithubFormatterTest(unittest.IsolatedAsyncioTestCase):
 
         with open("tests/example_github_push.json", "rb") as f:
             example_github_push = f.read().strip()
-
         self.assertEqual(
             httpx.post(
                 f"{BOT_URL}/{room.room_id}",
@@ -45,7 +48,40 @@ class GithubFormatterTest(unittest.IsolatedAsyncioTestCase):
                     "formatter": "github",
                 },
                 content=example_github_push,
-                headers=EXAMPLE_GITHUB_REQUEST_HEADERS,
+                headers=headers(event="something else"),
+            ).json(),
+            {"status": 200, "ret": "OK"},
+        )
+
+        sync = await client.sync()
+        messages = await client.room_messages(room.room_id, sync.next_batch)
+        await client.close()
+
+        message = messages.chunk[0]
+        self.assertEqual(message.sender, FULL_ID)
+        self.assertEqual(
+            message.formatted_body,
+            "<p>notification from github</p>",
+        )
+
+    async def test_github_push(self):
+        """Send a mock github push webhook, and check the result."""
+        messages = []
+        client = nio.AsyncClient(MATRIX_URL, MATRIX_ID)
+
+        await client.login(MATRIX_PW)
+        room = await client.room_create()
+
+        with open("tests/example_github_push.json", "rb") as f:
+            example_github_push = f.read().strip()
+        self.assertEqual(
+            httpx.post(
+                f"{BOT_URL}/{room.room_id}",
+                params={
+                    "formatter": "github",
+                },
+                content=example_github_push,
+                headers=headers(),
             ).json(),
             {"status": 200, "ret": "OK"},
         )
@@ -69,3 +105,25 @@ class GithubFormatterTest(unittest.IsolatedAsyncioTestCase):
             message.formatted_body,
             expected,
         )
+
+    async def test_github_wrong_digest(self):
+        """Send a mock github push webhook with a wrong digest."""
+        client = nio.AsyncClient(MATRIX_URL, MATRIX_ID)
+
+        await client.login(MATRIX_PW)
+        room = await client.room_create()
+
+        with open("tests/example_github_push.json", "rb") as f:
+            example_github_push = f.read().strip()
+
+        self.assertEqual(
+            httpx.post(
+                f"{BOT_URL}/{room.room_id}",
+                params={
+                    "formatter": "github",
+                },
+                content=example_github_push,
+                headers=headers("wrong digest"),
+            ).json(),
+            {"status": 401, "ret": "Invalid SHA-256 HMAC digest"},
+        )