diff --git a/tests/fixtures/config/branch-mismatch/git/common-config/playbooks/base.yaml b/tests/fixtures/config/branch-mismatch/git/common-config/playbooks/base.yaml
new file mode 100644
index 0000000..f679dce
--- /dev/null
+++ b/tests/fixtures/config/branch-mismatch/git/common-config/playbooks/base.yaml
@@ -0,0 +1,2 @@
+- hosts: all
+  tasks: []
diff --git a/tests/fixtures/config/branch-mismatch/git/common-config/zuul.yaml b/tests/fixtures/config/branch-mismatch/git/common-config/zuul.yaml
new file mode 100644
index 0000000..9954846
--- /dev/null
+++ b/tests/fixtures/config/branch-mismatch/git/common-config/zuul.yaml
@@ -0,0 +1,22 @@
+- pipeline:
+    name: check
+    manager: independent
+    trigger:
+      gerrit:
+        - event: patchset-created
+    success:
+      gerrit:
+        Verified: 1
+    failure:
+      gerrit:
+        Verified: -1
+
+- job:
+    name: base
+    parent: null
+    run: playbooks/base.yaml
+
+- project:
+    name: common-config
+    check:
+      jobs: []
diff --git a/tests/fixtures/config/branch-mismatch/git/org_project1/README b/tests/fixtures/config/branch-mismatch/git/org_project1/README
new file mode 100644
index 0000000..9daeafb
--- /dev/null
+++ b/tests/fixtures/config/branch-mismatch/git/org_project1/README
@@ -0,0 +1 @@
+test
diff --git a/tests/fixtures/config/branch-mismatch/git/org_project1/zuul.yaml b/tests/fixtures/config/branch-mismatch/git/org_project1/zuul.yaml
new file mode 100644
index 0000000..809f830
--- /dev/null
+++ b/tests/fixtures/config/branch-mismatch/git/org_project1/zuul.yaml
@@ -0,0 +1,7 @@
+- job:
+    name: project-test1
+
+- project:
+    check:
+      jobs:
+        - project-test1
diff --git a/tests/fixtures/config/branch-mismatch/git/org_project2/README b/tests/fixtures/config/branch-mismatch/git/org_project2/README
new file mode 100644
index 0000000..9daeafb
--- /dev/null
+++ b/tests/fixtures/config/branch-mismatch/git/org_project2/README
@@ -0,0 +1 @@
+test
diff --git a/tests/fixtures/config/branch-mismatch/git/org_project2/zuul.yaml b/tests/fixtures/config/branch-mismatch/git/org_project2/zuul.yaml
new file mode 100644
index 0000000..3a8e9df
--- /dev/null
+++ b/tests/fixtures/config/branch-mismatch/git/org_project2/zuul.yaml
@@ -0,0 +1,13 @@
+- job:
+    name: project-test2
+    parent: project-test1
+    override-checkout: stable
+
+- project:
+    check:
+      jobs:
+        - project-test1:
+            required-projects:
+              - name: org/project1
+                override-checkout: stable
+        - project-test2
diff --git a/tests/fixtures/config/branch-mismatch/main.yaml b/tests/fixtures/config/branch-mismatch/main.yaml
new file mode 100644
index 0000000..950b117
--- /dev/null
+++ b/tests/fixtures/config/branch-mismatch/main.yaml
@@ -0,0 +1,9 @@
+- tenant:
+    name: tenant-one
+    source:
+      gerrit:
+        config-projects:
+          - common-config
+        untrusted-projects:
+          - org/project1
+          - org/project2