diff --git a/.github/workflows/pb-tests.yml b/.github/workflows/pb-tests.yml
index ad447808..5b3bed09 100644
--- a/.github/workflows/pb-tests.yml
+++ b/.github/workflows/pb-tests.yml
@@ -1,5 +1,10 @@
 name: Tests
 "on":
+    merge_group:
+        types:
+            - checks_requested
+        branches:
+            - main
     pull_request: {}
     push:
         branches:
diff --git a/octo/actions/event/merge_group.go b/octo/actions/event/merge_group.go
new file mode 100644
index 00000000..ac6d8d79
--- /dev/null
+++ b/octo/actions/event/merge_group.go
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2018-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package event
+
+const MergeGroupType Type = "merge_group"
+
+type MergeGroupActivityType string
+
+const (
+	MergeGroupChecksRequested MergeGroupActivityType = "checks_requested"
+)
+
+type MergeGroup struct {
+	Types          []MergeGroupActivityType `yaml:",omitempty"`
+	Branches       []string                 `yaml:",omitempty"`
+	BranchesIgnore []string                 `yaml:"branches-ignore,omitempty"`
+	Paths          []string                 `yaml:",omitempty"`
+	PathsIgnore    []string                 `yaml:"paths-ignore,omitempty"`
+}
+
+func (MergeGroup) Type() Type {
+	return MergeGroupType
+}
diff --git a/octo/test.go b/octo/test.go
index 7217ebaa..24b58b9e 100644
--- a/octo/test.go
+++ b/octo/test.go
@@ -51,6 +51,10 @@ func ContributeTest(descriptor Descriptor) (*Contribution, error) {
 			event.PushType: event.Push{
 				Branches: []string{"main"},
 			},
+			event.MergeGroupType: event.MergeGroup{
+				Types:    []event.MergeGroupActivityType{event.MergeGroupChecksRequested},
+				Branches: []string{"main"},
+			},
 		},
 		Jobs: map[string]actions.Job{},
 	}