diff --git a/lib/classes/PluginManager.test.js b/lib/classes/PluginManager.test.js
index 8c3ae8d15..e732f95cc 100644
--- a/lib/classes/PluginManager.test.js
+++ b/lib/classes/PluginManager.test.js
@@ -1048,6 +1048,26 @@ describe('PluginManager', () => {
     });
   });
 
+  describe('#loadVariableGetters()', () => {
+    it('should load the plugin variable getters', () => {
+      const getTestVariable = async () => 'testVariable'
+      class VariableGetterPlugin {
+        constructor(sls) {
+          this.variableGetters = [[/^test:/, getTestVariable]]
+        }
+      }
+      pluginManager.serverless.variables = {
+        variableResolvers: [],
+        customVariableResolverFuncs: {},
+      }
+      const pluginInstance = new VariableGetterPlugin();
+      pluginManager.loadVariableGetters(pluginInstance);
+
+      expect(pluginManager.serverless.variables.variableResolvers).to.deep.equal([[/^test:/, 'getTestVariable']])
+      expect(Object.keys(pluginManager.serverless.variables.customVariableResolverFuncs)).to.deep.equal(['getTestVariable'])
+    });
+  });
+
   describe('#getEvents()', () => {
     beforeEach(() => {
       // eslint-disable-line prefer-arrow-callback