diff --git a/tests/lib/rules/camelcase.js b/tests/lib/rules/camelcase.js
index 1181561efa8f..fdd15ee6a242 100644
--- a/tests/lib/rules/camelcase.js
+++ b/tests/lib/rules/camelcase.js
@@ -161,6 +161,16 @@ ruleTester.run("camelcase", rule, {
             options: [{ ignoreImports: false }],
             parserOptions: { ecmaVersion: 6, sourceType: "module" }
         },
+        {
+            code: "var _camelCased = camelCased",
+            options: [{ ignoreGlobals: false }],
+            globals: { camelCased: false }
+        },
+        {
+            code: "var camelCased = snake_cased",
+            options: [{ ignoreGlobals: true }],
+            globals: { snake_cased: false } // eslint-disable-line camelcase
+        },
         {
             code: "function foo({ no_camelcased: camelCased }) {};",
             parserOptions: { ecmaVersion: 6 }
@@ -590,6 +600,18 @@ ruleTester.run("camelcase", rule, {
                 }
             ]
         },
+        {
+            code: "var camelCased = snake_cased",
+            options: [{ ignoreGlobals: false }],
+            globals: { snake_cased: false }, // eslint-disable-line camelcase
+            errors: [
+                {
+                    messageId: "notCamelCase",
+                    data: { name: "snake_cased" },
+                    type: "Identifier"
+                }
+            ]
+        },
         {
             code: "function foo({ no_camelcased }) {};",
             parserOptions: { ecmaVersion: 6 },