diff --git a/packages/url/src/get-query-string.js b/packages/url/src/get-query-string.js
index e1437f4e78a13..8624ce5c6c8b9 100644
--- a/packages/url/src/get-query-string.js
+++ b/packages/url/src/get-query-string.js
@@ -13,7 +13,7 @@
 export function getQueryString( url ) {
 	let query;
 	try {
-		query = new URL( url ).search.substring( 1 );
+		query = new URL( url, 'http://example.com' ).search.substring( 1 );
 	} catch ( error ) {}
 
 	if ( query ) {
diff --git a/packages/url/src/test/index.test.js b/packages/url/src/test/index.test.js
index ddb603ba3fa76..d8a98c98a04b4 100644
--- a/packages/url/src/test/index.test.js
+++ b/packages/url/src/test/index.test.js
@@ -287,6 +287,14 @@ describe( 'getQueryString', () => {
 		).toBe( 'foo=bar&foo=baz?test' );
 	} );
 
+	it( 'returns the query string of a path', () => {
+		expect( getQueryString( '/wp-json/wp/v2/posts?type=page' ) ).toBe(
+			'type=page'
+		);
+
+		expect( getQueryString( '/wp-json/wp/v2/posts' ) ).toBeUndefined();
+	} );
+
 	it( 'returns undefined when the provided does not contain a url query string', () => {
 		expect( getQueryString( '' ) ).toBeUndefined();
 		expect(