diff --git a/tests/bundle/invalid.yaml b/tests/bundle/invalid.yaml
new file mode 100644
index 0000000..2e51c1e
--- /dev/null
+++ b/tests/bundle/invalid.yaml
@@ -0,0 +1,7 @@
+applications:
+  myapp:
+    charm: cs:xenial/ubuntu-0
+    num_units: 1
+    to:
+      - 0
+      - 0
diff --git a/tests/bundle/mini-bundle.yaml b/tests/bundle/mini-bundle.yaml
new file mode 100644
index 0000000..84d9a61
--- /dev/null
+++ b/tests/bundle/mini-bundle.yaml
@@ -0,0 +1,9 @@
+series: xenial
+applications:
+  dummy-sink:
+    charm: cs:~juju-qa/dummy-sink
+    num_units: 1
+  dummy-subordinate:
+    charm: cs:~juju-qa/dummy-subordinate
+relations:
+  - ['dummy-sink', 'dummy-subordinate']