diff --git a/probe/plugins/registry_internal_test.go b/probe/plugins/registry_internal_test.go
index cba906965..5b7a3bc0a 100644
--- a/probe/plugins/registry_internal_test.go
+++ b/probe/plugins/registry_internal_test.go
@@ -425,6 +425,11 @@ func TestRegistryRejectsErroneousPluginResponses(t *testing.T) {
 			Name:    "changedId",
 			Handler: stringHandler(http.StatusOK, `{"Plugins":[{"id":"differentId","label":"changedId","interfaces":["reporter"]}]}`),
 		}.file(),
+		mockPlugin{
+			t:       t,
+			Name:    "moreThanOnePlugin",
+			Handler: stringHandler(http.StatusOK, `{"Plugins":[{"id":"moreThanOnePlugin","label":"moreThanOnePlugin","interfaces":["reporter"]}, {"id":"haha","label":"haha","interfaces":["reporter"]}]}`),
+		}.file(),
 	)
 	defer restore(t)
 
@@ -442,6 +447,11 @@ func TestRegistryRejectsErroneousPluginResponses(t *testing.T) {
 			Label:  "changedId",
 			Status: `error: plugin must not change its id (is "differentId", should be "changedId")`,
 		},
+		{
+			ID:     "moreThanOnePlugin",
+			Label:  "moreThanOnePlugin",
+			Status: `error: report must contain exactly one plugin (found 2)`,
+		},
 		{
 			ID:         "noInterface",
 			Label:      "noInterface",