diff --git a/src/sonar/file-scanner.ts b/src/sonar/file-scanner.ts
index fa769a82..03116135 100644
--- a/src/sonar/file-scanner.ts
+++ b/src/sonar/file-scanner.ts
@@ -77,7 +77,7 @@ export function loadSchemaFiles(path: string, options: LoadSchemaFilesOptions =
 
   return relevantPaths.map(path => {
     
-    if (path.includes('/index.') && options.ignoreIndex) {
+    if (isIndex(path, execOptions.extensions) && options.ignoreIndex) {
       return false;
     }
 
@@ -124,7 +124,7 @@ export function loadResolversFiles<Resolvers extends IResolvers = IResolvers>(pa
 
   return relevantPaths.map(path => {
     
-    if (path.includes('/index.') && options.ignoreIndex) {
+    if (isIndex(path, execOptions.extensions) && options.ignoreIndex) {
       return false;
     }
 
@@ -155,7 +155,7 @@ export async function loadSchemaFilesAsync(path: string, options: LoadSchemaFile
 
   return Promise.all(relevantPaths.map(async path => {
     
-    if (path.includes('/index.') && options.ignoreIndex) {
+    if (isIndex(path, execOptions.extensions) && options.ignoreIndex) {
       return false;
     }
 
@@ -191,7 +191,7 @@ export async function loadResolversFilesAsync<Resolvers extends IResolvers = IRe
 
   return Promise.all(relevantPaths.map(async path => {
     
-    if (path.includes('/index.') && options.ignoreIndex) {
+    if (isIndex(path, execOptions.extensions) && options.ignoreIndex) {
       return false;
     }
 
@@ -204,3 +204,8 @@ export async function loadResolversFilesAsync<Resolvers extends IResolvers = IRe
     }
   }));
 }
+
+function isIndex(path: string, extensions: string[] = []): boolean {
+  const IS_INDEX = /(\/|\\)index\.[^\/\\]+$/i; // (/ or \) AND `index.` AND (everything except \ and /)(end of line)
+  return IS_INDEX.test(path) && extensions.some(ext => path.endsWith('.' + ext));
+}
diff --git a/tests/sonar/file-scanner.spec.ts b/tests/sonar/file-scanner.spec.ts
index 843f3d53..9de04d83 100644
--- a/tests/sonar/file-scanner.spec.ts
+++ b/tests/sonar/file-scanner.spec.ts
@@ -1,22 +1,30 @@
-import {loadResolversFiles, loadSchemaFiles} from '../../src';
+import { loadResolversFiles, loadSchemaFiles } from '../../src';
 
-function testSchemaDir(path: string, expectedResult: any, note: string, extensions?: string[] | null) {
+function testSchemaDir({ path, expected, note, extensions, ignoreIndex }: { path: string; expected: any; note: string; extensions?: string[] | null; ignoreIndex?: boolean }) {
   it(`should return the correct schema results for path: ${path} (${note})`, () => {
-    const result = loadSchemaFiles(path, extensions ? { extensions } : {});
+    const options = { ignoreIndex };
+    const result = loadSchemaFiles(path, extensions ? { ...options, extensions } : options);
 
-    expect(result.length).toBe(expectedResult.length);
-    expect(result.map(stripWhitespaces)).toEqual(expectedResult.map(stripWhitespaces));
+    expect(result.length).toBe(expected.length);
+    expect(result.map(stripWhitespaces)).toEqual(expected.map(stripWhitespaces));
   });
 }
 
-function testResolversDir(path: string, expectedResult: any, note: string, extensions: string[] | null = null, compareValue = true) {
+function testResolversDir({ path, expected, note, extensions, compareValue, ignoreIndex }: { path: string; expected: any; note: string; extensions?: string[]; compareValue?: boolean; ignoreIndex?: boolean }) {
+  if (typeof compareValue === 'undefined') {
+    compareValue = true;
+  }
+
   it(`should return the correct resolvers results for path: ${path} (${note})`, () => {
-    const result = loadResolversFiles(path, extensions ? { extensions } : {});
+    const options = {
+      ignoreIndex,
+    };
+    const result = loadResolversFiles(path, extensions ? { ...options, extensions } : options);
 
-    expect(result.length).toBe(expectedResult.length);
+    expect(result.length).toBe(expected.length);
 
     if (compareValue) {
-      expect(result).toEqual(expectedResult);
+      expect(result).toEqual(expected);
     }
   });
 }
@@ -25,22 +33,122 @@ function stripWhitespaces(str: string): string {
   return str.replace(/\s+/g, ' ').trim();
 }
 
-describe('file scanner', function () {
+describe('file scanner', function() {
   describe('schema', () => {
     const schemaContent = `type MyType { f: String }`;
-    testSchemaDir('./tests/sonar/test-assets/1', [schemaContent], 'one file');
-    testSchemaDir('./tests/sonar/test-assets/2', [schemaContent, schemaContent, schemaContent], 'multiple files');
-    testSchemaDir('./tests/sonar/test-assets/3', [schemaContent, schemaContent, schemaContent], 'recursive');
-    testSchemaDir('./tests/sonar/test-assets/4', [schemaContent], 'custom extension', ['schema']);
-    testSchemaDir('./tests/sonar/test-assets/5', [schemaContent, schemaContent], 'custom extensions', ['schema', 'myschema']);
-    testSchemaDir('./tests/sonar/test-assets/10', [schemaContent, schemaContent, schemaContent], 'code files with gql tag', ['js']);
+    testSchemaDir({
+      path: './tests/sonar/test-assets/1',
+      expected: [schemaContent],
+      note: 'one file',
+    });
+    testSchemaDir({
+      path: './tests/sonar/test-assets/2',
+      expected: [schemaContent, schemaContent, schemaContent],
+      note: 'multiple files',
+    });
+    testSchemaDir({
+      path: './tests/sonar/test-assets/3',
+      expected: [schemaContent, schemaContent, schemaContent],
+      note: 'recursive',
+    });
+    testSchemaDir({
+      path: './tests/sonar/test-assets/4',
+      expected: [schemaContent],
+      note: 'custom extension',
+      extensions: ['schema'],
+    });
+    testSchemaDir({
+      path: './tests/sonar/test-assets/5',
+      expected: [schemaContent, schemaContent],
+      note: 'custom extensions',
+      extensions: ['schema', 'myschema'],
+    });
+    testSchemaDir({
+      path: './tests/sonar/test-assets/10',
+      expected: [schemaContent, schemaContent, schemaContent],
+      note: 'code files with gql tag',
+      extensions: ['js'],
+    });
+    testSchemaDir({
+      path: './tests/sonar/test-assets/10',
+      expected: [schemaContent, schemaContent, schemaContent],
+      note: 'code files with gql tag',
+      extensions: ['js'],
+    });
+    testSchemaDir({
+      path: './tests/sonar/test-assets/12',
+      expected: [schemaContent],
+      note: 'should ignore index on demand',
+      extensions: ['graphql'],
+      ignoreIndex: true,
+    });
+    testSchemaDir({
+      path: './tests/sonar/test-assets/12',
+      expected: [schemaContent, `type IndexType { f: Int }`],
+      note: 'should include index by default',
+      extensions: ['graphql'],
+    });
   });
 
   describe('resolvers', () => {
-    testResolversDir('./tests/sonar/test-assets/6', [{ MyType: { f: 1 }}], 'one file');
-    testResolversDir('./tests/sonar/test-assets/7', [{ MyType: { f: 1 }}, { MyType: { f: 2 }}], 'multiple files');
-    testResolversDir('./tests/sonar/test-assets/8', [{ MyType: { f: 1 }}], 'default export');
-    testResolversDir('./tests/sonar/test-assets/9', [{ MyType: { f: 1 }}, { MyType: { f: 2 }}], 'named exports');
-    testResolversDir('./tests/sonar/test-assets/11', (new Array(2)).fill(''), 'ignored extensions', null, false);
+    testResolversDir({
+      path: './tests/sonar/test-assets/6',
+      expected: [{ MyType: { f: 1 } }],
+      note: 'one file',
+    });
+    testResolversDir({
+      path: './tests/sonar/test-assets/7',
+      expected: [{ MyType: { f: 1 } }, { MyType: { f: 2 } }],
+      note: 'multiple files',
+    });
+    testResolversDir({
+      path: './tests/sonar/test-assets/8',
+      expected: [{ MyType: { f: 1 } }],
+      note: 'default export',
+    });
+    testResolversDir({
+      path: './tests/sonar/test-assets/9',
+      expected: [{ MyType: { f: 1 } }, { MyType: { f: 2 } }],
+      note: 'named exports',
+    });
+    testResolversDir({
+      path: './tests/sonar/test-assets/11',
+      expected: new Array(2).fill(''),
+      note: 'ignored extensions',
+      extensions: null,
+      compareValue: false,
+    });
+    testResolversDir({
+      path: './tests/sonar/test-assets/12',
+      expected: [
+        {
+          MyType: {
+            f: '12',
+          },
+        },
+        {
+          IndexType: {
+            f: '12',
+          },
+        },
+      ],
+      note: 'includes index files but only if it matches extensions',
+      extensions: ['js'],
+      compareValue: true,
+    });
+    testResolversDir({
+      path: './tests/sonar/test-assets/12',
+      expected: [
+        {
+          MyType: {
+            f: '12',
+          },
+        },
+      ],
+      note: 'ingore index files',
+      extensions: ['js'],
+      compareValue: true,
+      ignoreIndex: true,
+    });
   });
 });
diff --git a/tests/sonar/test-assets/12/1.graphql b/tests/sonar/test-assets/12/1.graphql
new file mode 100644
index 00000000..2e757754
--- /dev/null
+++ b/tests/sonar/test-assets/12/1.graphql
@@ -0,0 +1,3 @@
+type MyType {
+  f: String
+}
diff --git a/tests/sonar/test-assets/12/1.js b/tests/sonar/test-assets/12/1.js
new file mode 100644
index 00000000..7507c912
--- /dev/null
+++ b/tests/sonar/test-assets/12/1.js
@@ -0,0 +1,13 @@
+const gql = require('graphql-tag');
+
+const MyType = gql`
+  type MyType {
+    f: String
+  }
+`;
+
+module.exports = {
+  MyType: {
+    f: '12',
+  },
+};
diff --git a/tests/sonar/test-assets/12/index.graphql b/tests/sonar/test-assets/12/index.graphql
new file mode 100644
index 00000000..52a0c2c3
--- /dev/null
+++ b/tests/sonar/test-assets/12/index.graphql
@@ -0,0 +1,3 @@
+type IndexType {
+  f: Int
+}
diff --git a/tests/sonar/test-assets/12/index.js b/tests/sonar/test-assets/12/index.js
new file mode 100644
index 00000000..b562e82b
--- /dev/null
+++ b/tests/sonar/test-assets/12/index.js
@@ -0,0 +1,13 @@
+const gql = require('graphql-tag');
+
+const IndexType = gql`
+  type IndexType {
+    f: Int
+  }
+`;
+
+module.exports = {
+  IndexType: {
+    f: '12',
+  },
+};
diff --git a/tests/sonar/test-assets/12/index.ts b/tests/sonar/test-assets/12/index.ts
new file mode 100644
index 00000000..ac68c5f4
--- /dev/null
+++ b/tests/sonar/test-assets/12/index.ts
@@ -0,0 +1,5 @@
+export default {
+  IngoredType: {
+    f: '12',
+  },
+};