diff --git a/packages/xo-collection/src/clear-object.js b/packages/xo-collection/src/clear-object.js
new file mode 100644
index 000000000..4e5882ac6
--- /dev/null
+++ b/packages/xo-collection/src/clear-object.js
@@ -0,0 +1,5 @@
+export default function clearObject (object) {
+  for (let key in object) {
+    delete object[key]
+  }
+}
diff --git a/packages/xo-collection/src/index.js b/packages/xo-collection/src/index.js
index a4741d557..61aa811e5 100644
--- a/packages/xo-collection/src/index.js
+++ b/packages/xo-collection/src/index.js
@@ -1,29 +1,8 @@
 import bind from 'lodash.bind'
-import {BaseError} from 'make-error'
 
-// ===================================================================
-
-class NotImplemented extends BaseError {
-  constructor (message) {
-    super(message || 'this method is not implemented')
-  }
-}
-
-// ===================================================================
-
-const clearObject = (object) => {
-  for (let key in object) {
-    delete object[key]
-  }
-}
-
-const isEmpty = (object) => {
-  /* eslint no-unused-vars: 0 */
-  for (let key in object) {
-    return false
-  }
-  return true
-}
+import clearObject from './clear-object'
+import isEmpty from './is-empty'
+import NotImplemented from './not-implemented'
 
 // ===================================================================
 
diff --git a/packages/xo-collection/src/is-empty.js b/packages/xo-collection/src/is-empty.js
new file mode 100644
index 000000000..a3ad65cb1
--- /dev/null
+++ b/packages/xo-collection/src/is-empty.js
@@ -0,0 +1,7 @@
+export default function isEmpty (object) {
+  /* eslint no-unused-vars: 0 */
+  for (let key in object) {
+    return false
+  }
+  return true
+}
diff --git a/packages/xo-collection/src/not-implemented.js b/packages/xo-collection/src/not-implemented.js
new file mode 100644
index 000000000..52e507e37
--- /dev/null
+++ b/packages/xo-collection/src/not-implemented.js
@@ -0,0 +1,7 @@
+import {BaseError} from 'make-error'
+
+export default class NotImplemented extends BaseError {
+  constructor (message) {
+    super(message || 'this method is not implemented')
+  }
+}