diff --git a/testcharms/charms/space-defender/manifest.yaml b/testcharms/charms/space-defender/manifest.yaml
new file mode 100644
index 00000000000..f8526f03d04
--- /dev/null
+++ b/testcharms/charms/space-defender/manifest.yaml
@@ -0,0 +1,16 @@
+bases:
+  - name: ubuntu
+    channel: 24.04/stable
+    architectures:
+      - amd64
+      - arm64
+  - name: ubuntu
+    channel: 22.04/stable
+    architectures:
+      - amd64
+      - arm64
+  - name: ubuntu
+    channel: 20.04/stable
+    architectures:
+      - amd64
+      - arm64