diff --git a/test/unit/@node-red/registry/lib/installer_spec.js b/test/unit/@node-red/registry/lib/installer_spec.js
index 80b96ecfb..7f514e99d 100644
--- a/test/unit/@node-red/registry/lib/installer_spec.js
+++ b/test/unit/@node-red/registry/lib/installer_spec.js
@@ -25,6 +25,7 @@ var NR_TEST_UTILS = require("nr-test-utils");
 var installer = NR_TEST_UTILS.require("@node-red/registry/lib/installer");
 var registry = NR_TEST_UTILS.require("@node-red/registry/lib/index");
 var typeRegistry = NR_TEST_UTILS.require("@node-red/registry/lib/registry");
+let pluginRegistry = NR_TEST_UTILS.require("@node-red/registry/lib/plugins");
 const { events, exec, log, hooks } =  NR_TEST_UTILS.require("@node-red/util");
 
 describe('nodes/registry/installer', function() {
@@ -66,6 +67,9 @@ describe('nodes/registry/installer', function() {
         if (typeRegistry.setModulePendingUpdated.restore) {
             typeRegistry.setModulePendingUpdated.restore();
         }
+        if (pluginRegistry.removeModule.restore) {
+            pluginRegistry.removeModule.restore();
+        }
         if (fs.statSync.restore) {
             fs.statSync.restore();
         }
@@ -502,6 +506,9 @@ describe('nodes/registry/installer', function() {
             var removeModule = sinon.stub(typeRegistry,"removeModule").callsFake(function(md) {
                 return nodeInfo;
             });
+            let removePluginModule = sinon.stub(pluginRegistry,"removeModule").callsFake(function(md) {
+                return [];
+            });
             var getModuleInfo = sinon.stub(registry,"getModuleInfo").callsFake(function(md) {
                 return {nodes:[]};
             });