diff --git a/modules/ve-mw/init/ve.init.mw.ApiResponseCache.js b/modules/ve-mw/init/ve.init.mw.ApiResponseCache.js
index 03f2fbe476..d2d6419662 100644
--- a/modules/ve-mw/init/ve.init.mw.ApiResponseCache.js
+++ b/modules/ve-mw/init/ve.init.mw.ApiResponseCache.js
@@ -14,11 +14,14 @@
  * @class
  * @extends OO.EventEmitter
  * @constructor
+ * @param {mw.Api} [api] API object to use. Defaults to new mw.Api()
  */
-ve.init.mw.ApiResponseCache = function VeInitMwApiResponseCache() {
+ve.init.mw.ApiResponseCache = function VeInitMwApiResponseCache( api ) {
 	// Mixin constructor
 	OO.EventEmitter.call( this );
 
+	this.api = api || new mw.Api();
+
 	// Keys are titles, values are deferreds
 	this.deferreds = {};
 
diff --git a/modules/ve-mw/init/ve.init.mw.GalleryImageInfoCache.js b/modules/ve-mw/init/ve.init.mw.GalleryImageInfoCache.js
index 743e4c0f79..f53a838ebf 100644
--- a/modules/ve-mw/init/ve.init.mw.GalleryImageInfoCache.js
+++ b/modules/ve-mw/init/ve.init.mw.GalleryImageInfoCache.js
@@ -11,9 +11,11 @@
  * @class
  * @extends ve.init.mw.ImageInfoCache
  * @constructor
+ * @param {mw.Api} [api]
  */
 ve.init.mw.GalleryImageInfoCache = function VeInitMwGalleryImageInfoCache() {
-	ve.init.mw.GalleryImageInfoCache.super.call( this );
+	// Parent constructor
+	ve.init.mw.GalleryImageInfoCache.super.apply( this, arguments );
 };
 
 /* Inheritance */
@@ -26,7 +28,7 @@ OO.inheritClass( ve.init.mw.GalleryImageInfoCache, ve.init.mw.ImageInfoCache );
  * @inheritdoc
  */
 ve.init.mw.GalleryImageInfoCache.prototype.getRequestPromise = function ( subqueue ) {
-	return new mw.Api().get(
+	return this.api.get(
 		{
 			action: 'query',
 			prop: 'imageinfo',
diff --git a/modules/ve-mw/init/ve.init.mw.ImageInfoCache.js b/modules/ve-mw/init/ve.init.mw.ImageInfoCache.js
index 478bdb1c34..68d17369da 100644
--- a/modules/ve-mw/init/ve.init.mw.ImageInfoCache.js
+++ b/modules/ve-mw/init/ve.init.mw.ImageInfoCache.js
@@ -11,9 +11,11 @@
  * @class
  * @extends ve.init.mw.ApiResponseCache
  * @constructor
+ * @param {mw.Api} [api]
  */
 ve.init.mw.ImageInfoCache = function VeInitMwImageInfoCache() {
-	ve.init.mw.ImageInfoCache.super.call( this );
+	// Parent constructor
+	ve.init.mw.ImageInfoCache.super.apply( this, arguments );
 };
 
 /* Inheritance */
@@ -41,7 +43,7 @@ ve.init.mw.ImageInfoCache.static.processPage = function ( page ) {
 ve.init.mw.ImageInfoCache.prototype.getRequestPromise = function ( subqueue ) {
 	// If you change what `iiprop`s are being fetched, update
 	// ve.ui.MWMediaDialog to add the same ones to the cache.
-	return new mw.Api().get(
+	return this.api.get(
 		{
 			action: 'query',
 			prop: 'imageinfo',
diff --git a/modules/ve-mw/init/ve.init.mw.LinkCache.js b/modules/ve-mw/init/ve.init.mw.LinkCache.js
index 4abe29e342..c22c32ba6b 100644
--- a/modules/ve-mw/init/ve.init.mw.LinkCache.js
+++ b/modules/ve-mw/init/ve.init.mw.LinkCache.js
@@ -11,9 +11,11 @@
  * @class
  * @extends ve.init.mw.ApiResponseCache
  * @constructor
+ * @param {mw.Api} [api]
  */
 ve.init.mw.LinkCache = function VeInitMwLinkCache() {
-	ve.init.mw.LinkCache.super.call( this );
+	// Parent constructor
+	ve.init.mw.LinkCache.super.apply( this, arguments );
 
 	// Keys are page names, values are link data objects
 	// This is kept for synchronous retrieval of cached values via #getCached
@@ -184,7 +186,7 @@ ve.init.mw.LinkCache.prototype.get = function ( title ) {
  * @inheritdoc
  */
 ve.init.mw.LinkCache.prototype.getRequestPromise = function ( subqueue ) {
-	return new mw.Api().get( {
+	return this.api.get( {
 		action: 'query',
 		prop: 'info|pageprops|pageimages|description',
 		pithumbsize: 80,