diff --git a/cmd/manager/main.go b/cmd/manager/main.go
index 83b18d3..e56c4f8 100644
--- a/cmd/manager/main.go
+++ b/cmd/manager/main.go
@@ -172,6 +172,11 @@ var (
 	}
 )
 
+var extraTestPackages []struct {
+	name      string
+	setupFunc func(*imagetest.TestWorkflow) error
+}
+
 // StringSlice is a flag.Value that represents a comma-separated list of strings.
 type StringSlice []string
 
@@ -458,6 +463,8 @@ func main() {
 		},
 	}
 
+	testPackages = append(testPackages, extraTestPackages...)
+
 	ctx := context.Background()
 	var computeclient compute.Client
 	var err error