diff --git a/services/automerge/automerge_test.go b/services/automerge/automerge_test.go
new file mode 100644
index 0000000000..4ad5b70cce
--- /dev/null
+++ b/services/automerge/automerge_test.go
@@ -0,0 +1,54 @@
+// Copyright 2026 Forgejo Authors. All rights reserved.
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package automerge
+
+import (
+	"testing"
+
+	"forgejo.org/models/db"
+	issues_model "forgejo.org/models/issues"
+	"forgejo.org/models/perm"
+	access_model "forgejo.org/models/perm/access"
+	pull_model "forgejo.org/models/pull"
+	"forgejo.org/models/unit"
+	"forgejo.org/models/unittest"
+	user_model "forgejo.org/models/user"
+	"forgejo.org/modules/util"
+	"github.com/stretchr/testify/require"
+)
+
+func TestRemoveScheduledAutoMerge(t *testing.T) {
+	defer unittest.OverrideFixtures("services/automerge/fixtures/TestRemoveScheduledAutoMerge")()
+	require.NoError(t, unittest.PrepareTestDatabase())
+
+	user2 := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 2})
+	user5 := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 5})
+	pull1 := unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{ID: 1})
+	pull2 := unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{ID: 2})
+
+	t.Run("No automerge", func(t *testing.T) {
+		err := RemoveScheduledAutoMerge(t.Context(), user5, pull2, access_model.Permission{})
+		require.ErrorIs(t, err, db.ErrNotExist{Resource: "auto_merge", ID: 2})
+	})
+
+	t.Run("No permission", func(t *testing.T) {
+		err := RemoveScheduledAutoMerge(t.Context(), user5, pull1, access_model.Permission{})
+		require.ErrorIs(t, err, util.ErrPermissionDenied)
+
+		err = RemoveScheduledAutoMerge(t.Context(), user5, pull1, access_model.Permission{UnitsMode: map[unit.Type]perm.AccessMode{
+			unit.TypePullRequests: perm.AccessModeRead,
+		}})
+		require.ErrorIs(t, err, util.ErrPermissionDenied)
+	})
+
+	t.Run("Normal", func(t *testing.T) {
+		err := RemoveScheduledAutoMerge(t.Context(), user2, pull1, access_model.Permission{UnitsMode: map[unit.Type]perm.AccessMode{
+			unit.TypePullRequests: perm.AccessModeWrite,
+		}})
+		require.NoError(t, err)
+
+		unittest.AssertExistsIf(t, false, &pull_model.AutoMerge{PullID: pull1.ID})
+		unittest.AssertExistsIf(t, true, &issues_model.Comment{IssueID: pull1.IssueID, Type: issues_model.CommentTypePRUnScheduledToAutoMerge})
+	})
+}
diff --git a/services/automerge/fixtures/TestRemoveScheduledAutoMerge/pull_auto_merge.yml b/services/automerge/fixtures/TestRemoveScheduledAutoMerge/pull_auto_merge.yml
new file mode 100644
index 0000000000..2cacb611c3
--- /dev/null
+++ b/services/automerge/fixtures/TestRemoveScheduledAutoMerge/pull_auto_merge.yml
@@ -0,0 +1,8 @@
+-
+  id: 1001
+  pull_id: 1
+  doer_id: 2
+  merge_style: "merge"
+  message: "Automatically merged"
+  delete_branch_after_merge: false
+  created_unix: 1771800000
diff --git a/services/automerge/main_test.go b/services/automerge/main_test.go
new file mode 100644
index 0000000000..8c0e558b17
--- /dev/null
+++ b/services/automerge/main_test.go
@@ -0,0 +1,14 @@
+// Copyright 2026 The Forgejo Authors. All rights reserved.
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package automerge
+
+import (
+	"testing"
+
+	"forgejo.org/models/unittest"
+)
+
+func TestMain(m *testing.M) {
+	unittest.MainTest(m)
+}