diff --git a/extensions/vscode-api-tests/src/languages.test.ts b/extensions/vscode-api-tests/src/languages.test.ts
index afc5905b38e..d4a0c80130e 100644
--- a/extensions/vscode-api-tests/src/languages.test.ts
+++ b/extensions/vscode-api-tests/src/languages.test.ts
@@ -29,7 +29,7 @@ suite('languages namespace tests', () => {
 		let ran = false;
 		let uri = Uri.parse('ttt:path.far');
 
-		let r1 = languages.registerCodeActionsProvider({ pattern: '*.far' }, {
+		let r1 = languages.registerCodeActionsProvider({ pattern: '*.far', scheme: 'ttt' }, {
 			provideCodeActions(document, range, ctx): Command[] {
 
 				assert.equal(ctx.diagnostics.length, 2);
@@ -95,4 +95,4 @@ suite('languages namespace tests', () => {
 			}
 		}, done);
 	});
-});
\ No newline at end of file
+});