diff --git a/events/code_coverage_events/workflow.py b/events/code_coverage_events/workflow.py
index 4358189a1..b8d50273d 100644
--- a/events/code_coverage_events/workflow.py
+++ b/events/code_coverage_events/workflow.py
@@ -108,6 +108,17 @@ async def parse(self, body):
         Extract revisions from payload
         """
         taskGroupId = body["taskGroupId"]
+        scheduler = body["schedulerId"]
+
+        # Check the scheduler name before loading all tasks in the group
+        # We are only interested in Mozilla gecko builds
+        if not scheduler.startswith("gecko-level-"):
+            logger.info(
+                "Skipping task, unsupported scheduler",
+                group_id=taskGroupId,
+                scheduler=scheduler,
+            )
+            return None
 
         build_task = await self.get_build_task_in_group(taskGroupId)
         if build_task is None:
diff --git a/events/tests/test_workflow.py b/events/tests/test_workflow.py
index 6c7af190f..fa6429205 100644
--- a/events/tests/test_workflow.py
+++ b/events/tests/test_workflow.py
@@ -49,10 +49,15 @@ async def test_parse(mock_taskcluster):
 
     hook.triggered_groups.add("already-triggered-group")
 
-    assert await hook.parse({"taskGroupId": "already-triggered-group"}) is None
+    assert (
+        await hook.parse(
+            {"schedulerId": "gecko-level-1", "taskGroupId": "already-triggered-group"}
+        )
+        is None
+    )
 
 
-def run_async_parser(hook, group_id):
+def run_async_parser(hook, group_id, scheduler):
     """
     Helper to run the asynchronous parser using responses in the same event loop
     """
@@ -65,7 +70,7 @@ async def _check():
                 json=json.load(f),
                 status=200,
             )
-        return await hook.parse({"taskGroupId": group_id})
+        return await hook.parse({"schedulerId": scheduler, "taskGroupId": group_id})
 
     loop = asyncio.new_event_loop()
     return loop.run_until_complete(_check())
@@ -75,14 +80,29 @@ def test_wrong_branch(mock_taskcluster):
     bus = MessageBus()
     hook = CodeCoverage("services-staging-codecoverage/bot", "project-test", bus)
 
-    assert run_async_parser(hook, "bNq-VIT-Q12o6nXcaUmYNQ") is None
+    assert run_async_parser(hook, "bNq-VIT-Q12o6nXcaUmYNQ", "gecko-level-1") is None
 
 
 def test_success(mock_taskcluster):
     bus = MessageBus()
     hook = CodeCoverage("services-staging-codecoverage/bot", "project-test", bus)
 
-    assert run_async_parser(hook, "RS0UwZahQ_qAcdZzEb_Y9g") == [
+    assert run_async_parser(hook, "RS0UwZahQ_qAcdZzEb_Y9g", "gecko-level-1") == [
+        {
+            "REPOSITORY": "https://hg.mozilla.org/mozilla-central",
+            "REVISION": "ec3dd3ee2ae4b3a63529a912816a110e925eb2d0",
+        }
+    ]
+
+
+def test_scheduler(mock_taskcluster):
+    bus = MessageBus()
+    hook = CodeCoverage("services-staging-codecoverage/bot", "project-test", bus)
+
+    assert run_async_parser(hook, "RS0UwZahQ_qAcdZzEb_Y9g", "-") is None
+    assert run_async_parser(hook, "RS0UwZahQ_qAcdZzEb_Y9g", "anotherValue") is None
+    assert run_async_parser(hook, "RS0UwZahQ_qAcdZzEb_Y9g", "aws-Xxxx") is None
+    assert run_async_parser(hook, "RS0UwZahQ_qAcdZzEb_Y9g", "gecko-level-1") == [
         {
             "REPOSITORY": "https://hg.mozilla.org/mozilla-central",
             "REVISION": "ec3dd3ee2ae4b3a63529a912816a110e925eb2d0",
@@ -94,7 +114,7 @@ def test_success_windows(mock_taskcluster):
     bus = MessageBus()
     hook = CodeCoverage("services-staging-codecoverage/bot", "project-test", bus)
 
-    assert run_async_parser(hook, "MibGDsa4Q7uFNzDf7EV6nw") == [
+    assert run_async_parser(hook, "MibGDsa4Q7uFNzDf7EV6nw", "gecko-level-2") == [
         {
             "REPOSITORY": "https://hg.mozilla.org/mozilla-central",
             "REVISION": "63519bfd42ee379f597c0357af2e712ec3cd9f50",
@@ -106,7 +126,7 @@ def test_success_try(mock_taskcluster):
     bus = MessageBus()
     hook = CodeCoverage("services-staging-codecoverage/bot", "project-test", bus)
 
-    assert run_async_parser(hook, "FG3goVnCQfif8ZEOaM_4IA") == [
+    assert run_async_parser(hook, "FG3goVnCQfif8ZEOaM_4IA", "gecko-level-1") == [
         {
             "REPOSITORY": "https://hg.mozilla.org/try",
             "REVISION": "066cb18ba95a7efe144e729713c429e422d9f95b",