diff --git a/gutenberg b/gutenberg
index d6c843be2a..d384e16752 160000
--- a/gutenberg
+++ b/gutenberg
@@ -1 +1 @@
-Subproject commit d6c843be2a3180da7ee15bbc6c71399d7e55185c
+Subproject commit d384e167526d3eec152a707fa7592debc56ec648
diff --git a/src/jsdom-patches.js b/src/jsdom-patches.js
index 4ba82d699a..60d7c220d6 100644
--- a/src/jsdom-patches.js
+++ b/src/jsdom-patches.js
@@ -149,6 +149,21 @@ Node.prototype.insertBefore = function( /* Node */ newChild, /* Node*/ refChild
  */
 Element.prototype.matches = Element.prototype.matchesSelector;
 
+/*
+ * Implementation of Element.prototype.closest that it's missing from the jsdom-jscore fork we're using.
+ * See https://github.com/wordpress-mobile/gutenberg-mobile/issues/1625
+ */
+Element.prototype.closest = function( selector ) {
+	let el = this;
+	while ( el ) {
+		if ( el.matches( selector ) ) {
+			return el;
+		}
+		el = el.parentElement;
+	}
+	return null;
+};
+
 /**
  * Helper function to check if a node implements the NonDocumentTypeChildNode
  * interface