diff --git a/.eslintrc.js b/.eslintrc.js
index 90caaa39e3..7a3bb2f789 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -21,7 +21,7 @@ module.exports = {
     allowImportExportEverywhere: true,
   },
   globals: {
-    testRule: true,
+    testStylelintRule: true,
   },
   extends: ['airbnb', 'prettier', 'prettier/react'],
   plugins: ['react-hooks', 'header'],
@@ -39,17 +39,10 @@ module.exports = {
       'block',
       [
         '*',
-        {
-          pattern: ' * Copyright \\(c\\) Facebook, Inc. and its affiliates.',
-        },
+        ' * Copyright (c) Facebook, Inc. and its affiliates.',
         ' *',
-        {
-          pattern:
-            ' * This source code is licensed under the MIT license found in the',
-        },
-        {
-          pattern: ' * LICENSE file in the root directory of this source tree.',
-        },
+        ' * This source code is licensed under the MIT license found in the',
+        ' * LICENSE file in the root directory of this source tree.',
         ' ',
       ],
     ],
diff --git a/jest.config.js b/jest.config.js
index 072838e751..8bb2ddeeff 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -27,5 +27,5 @@ module.exports = {
   transform: {
     '^.+\\.[jt]sx?$': 'babel-jest',
   },
-  setupFiles: ['./jest-setup.js'],
+  setupFiles: ['./jest/stylelint-rule-test.js'],
 };
diff --git a/jest-setup.js b/jest/stylelint-rule-test.js
similarity index 54%
rename from jest-setup.js
rename to jest/stylelint-rule-test.js
index 10541990a9..679d0f5cda 100644
--- a/jest-setup.js
+++ b/jest/stylelint-rule-test.js
@@ -10,68 +10,55 @@ const stylelint = require('stylelint');
 
 function getOutputCss(output) {
   const result = output.results[0]._postcssResult;
-  const css = result.root.toString(result.opts.syntax);
-
-  return css;
+  return result.root.toString(result.opts.syntax);
 }
 
-global.testRule = (rule, schema) => {
-  describe(schema.ruleName, () => {
-    const stylelintConfig = {
-      plugins: ['./packages/stylelint-copyright'],
-      rules: {
-        [schema.ruleName]: schema.config,
-      },
-    };
-
+global.testStylelintRule = (config, tests) => {
+  describe(tests.ruleName, () => {
     const checkTestCaseContent = testCase =>
       testCase.description || testCase.code || 'no description';
 
-    if (schema.accept && schema.accept.length) {
-      describe('accept', () => {
-        schema.accept.forEach(testCase => {
+    if (tests.accept && tests.accept.length) {
+      describe('accept cases', () => {
+        tests.accept.forEach(testCase => {
           const spec = testCase.only ? it.only : it;
 
           spec(checkTestCaseContent(testCase), () => {
             const options = {
               code: testCase.code,
-              config: stylelintConfig,
-              syntax: schema.syntax,
+              config,
+              syntax: tests.syntax,
             };
 
             return stylelint.lint(options).then(output => {
               expect(output.results[0].warnings).toEqual([]);
 
-              if (!schema.fix) {
-                return;
+              if (!tests.fix) {
+                return null;
               }
 
-              // Check the fix
-              // eslint-disable-next-line consistent-return
+              // Check the fix.
               return stylelint
                 .lint({...options, fix: true})
-                .then(fixedOutput => {
-                  const fixedCode = getOutputCss(fixedOutput);
-
-                  expect(fixedCode).toBe(testCase.code);
-                });
+                .then(fixedOutput => getOutputCss(fixedOutput))
+                .then(fixedCode => expect(fixedCode).toBe(testCase.fixed));
             });
           });
         });
       });
     }
 
-    if (schema.reject && schema.reject.length) {
-      describe('reject', () => {
-        schema.reject.forEach(testCase => {
-          // eslint-disable-next-line no-nested-ternary
-          const spec = testCase.only ? it.only : testCase.skip ? it.skip : it;
+    if (tests.reject && tests.reject.length) {
+      describe('reject cases', () => {
+        tests.reject.forEach(testCase => {
+          const skip = testCase.skip ? it.skip : it;
+          const spec = testCase.only ? it.only : skip;
 
           spec(checkTestCaseContent(testCase), () => {
             const options = {
               code: testCase.code,
-              config: stylelintConfig,
-              syntax: schema.syntax,
+              config,
+              syntax: tests.syntax,
             };
 
             return stylelint.lint(options).then(output => {
@@ -81,44 +68,42 @@ global.testRule = (rule, schema) => {
               expect(warnings.length).toBeGreaterThanOrEqual(1);
               expect(testCase).toHaveMessage();
 
-              if (testCase.message !== undefined) {
+              if (testCase.message != null) {
                 expect(warning.text).toBe(testCase.message);
               }
 
-              if (testCase.line !== undefined) {
+              if (testCase.line != null) {
                 expect(warning.line).toBe(testCase.line);
               }
 
-              if (testCase.column !== undefined) {
+              if (testCase.column != null) {
                 expect(warning.column).toBe(testCase.column);
               }
 
-              if (!schema.fix) {
-                return;
+              if (!tests.fix) {
+                return null;
               }
 
               if (!testCase.fixed) {
                 throw new Error(
-                  'If using { fix: true } in test schema, all reject cases must have { fixed: .. }',
+                  'If using { fix: true } in test tests, all reject cases must have { fixed: .. }',
                 );
               }
-              // Check the fix
-              // eslint-disable-next-line consistent-return
+
+              // Check the fix.
               return stylelint
                 .lint({...options, fix: true})
-                .then(fixedOutput => {
-                  const fixedCode = getOutputCss(fixedOutput);
-
-                  expect(fixedCode).toBe(testCase.fixed);
-                });
+                .then(fixedOutput => getOutputCss(fixedOutput))
+                .then(fixedCode => expect(fixedCode).toBe(testCase.fixed));
             });
           });
         });
       });
     }
+
     expect.extend({
       toHaveMessage(testCase) {
-        if (testCase.message === undefined) {
+        if (testCase.message == null) {
           return {
             message: () =>
               'Expected "reject" test case to have a "message" property',
diff --git a/packages/stylelint-copyright/__tests__/index.js b/packages/stylelint-copyright/__tests__/index.js
index 9b4827693b..1da3eedc36 100644
--- a/packages/stylelint-copyright/__tests__/index.js
+++ b/packages/stylelint-copyright/__tests__/index.js
@@ -9,41 +9,49 @@ const rule = require('..');
 
 const {ruleName, messages} = rule;
 
-testRule(rule, {
-  ruleName,
-  fix: false,
-  accept: [
-    {
-      code: `
+testStylelintRule(
+  {
+    // Relative to repo root.
+    plugins: ['./packages/stylelint-copyright'],
+    rules: {
+      [ruleName]: true,
+    },
+  },
+  {
+    ruleName,
+    fix: false,
+    accept: [
+      {
+        code: `
 /**
  * Copyright
  */
 
  .foo {}`,
-    },
-    {
-      code: `
+      },
+      {
+        code: `
       /**
  * copyright
  */
 
  .foo {}`,
-    },
-  ],
-  reject: [
-    {
-      code: `
+      },
+    ],
+    reject: [
+      {
+        code: `
 /**
  * Copyleft
  */
 
  .foo {}`,
-      message: messages.rejected,
-      line: 2,
-      column: 1,
-    },
-    {
-      code: `
+        message: messages.rejected,
+        line: 2,
+        column: 1,
+      },
+      {
+        code: `
 /**
  * Copyleft
  */
@@ -52,9 +60,10 @@ testRule(rule, {
  * Copyright
  */
  .foo {}`,
-      message: messages.rejected,
-      line: 2,
-      column: 1,
-    },
-  ],
-});
+        message: messages.rejected,
+        line: 2,
+        column: 1,
+      },
+    ],
+  },
+);