diff --git a/common/script/libs/refPush.js b/common/script/libs/refPush.js
index 06b3617014..1bdddc9edf 100644
--- a/common/script/libs/refPush.js
+++ b/common/script/libs/refPush.js
@@ -7,13 +7,14 @@ import uuid from './uuid';
   no problem. To maintain sorting, we use these helper functions:
  */
 
-module.exports = function(reflist, item, prune) {
-  if (prune == null) {
-    prune = 0;
-  }
+module.exports = function refPush (reflist, item) {
   item.sort = _.isEmpty(reflist) ? 0 : _.max(reflist, 'sort').sort + 1;
+
   if (!(item.id && !reflist[item.id])) {
     item.id = uuid();
   }
-  return reflist[item.id] = item;
+
+  reflist[item.id] = item;
+
+  return reflist[item.id];
 };
diff --git a/tasks/gulp-eslint.js b/tasks/gulp-eslint.js
index e283b0d8eb..1943e8bd78 100644
--- a/tasks/gulp-eslint.js
+++ b/tasks/gulp-eslint.js
@@ -69,7 +69,6 @@ const COMMON_FILES = [
   '!./common/script/libs/planGemLimits.js',
   '!./common/script/libs/preenHistory.js',
   '!./common/script/libs/preenTodos.js',
-  '!./common/script/libs/refPush.js',
   '!./common/script/libs/removeWhitespace.js',
   '!./common/script/libs/silver.js',
   '!./common/script/libs/splitWhitespace.js',
diff --git a/test/common/libs/refPush.js b/test/common/libs/refPush.js
new file mode 100644
index 0000000000..4183845c9a
--- /dev/null
+++ b/test/common/libs/refPush.js
@@ -0,0 +1,53 @@
+import shared from '../../../common';
+import { v4 as generateUUID } from 'uuid';
+
+describe('refPush', () => {
+  it('it hashes one object into another by its id', () => {
+    let referenceObject = {};
+    let objectToHash = {
+      a: 1,
+      id: generateUUID(),
+    };
+
+    shared.refPush(referenceObject, objectToHash);
+
+    expect(referenceObject[objectToHash.id].a).to.equal(objectToHash.a);
+    expect(referenceObject[objectToHash.id].id).to.equal(objectToHash.id);
+    expect(referenceObject[objectToHash.id].sort).to.equal(0);
+  });
+
+  it('it hashes one object into another by a uuid when object does not have an id', () => {
+    let referenceObject = {};
+    let objectToHash = {
+      a: 1,
+    };
+
+    shared.refPush(referenceObject, objectToHash);
+
+    let hashedObject = _.find(referenceObject, (hashedItem) => {
+      return objectToHash.a === hashedItem.a;
+    });
+
+    expect(hashedObject.a).to.equal(objectToHash.a);
+    expect(hashedObject.id).to.equal(objectToHash.id);
+    expect(hashedObject.sort).to.equal(0);
+  });
+
+  it('it hashes one object into another by a id and gives it the highest sort value', () => {
+    let referenceObject = {};
+    referenceObject[generateUUID()] = { b: 2, sort: 1 };
+    let objectToHash = {
+      a: 1,
+    };
+
+    shared.refPush(referenceObject, objectToHash);
+
+    let hashedObject = _.find(referenceObject, (hashedItem) => {
+      return objectToHash.a === hashedItem.a;
+    });
+
+    expect(hashedObject.a).to.equal(objectToHash.a);
+    expect(hashedObject.id).to.equal(objectToHash.id);
+    expect(hashedObject.sort).to.equal(2);
+  });
+});