diff --git a/src/vs/editor/test/browser/view/viewLayer.test.ts b/src/vs/editor/test/browser/view/viewLayer.test.ts
index 0f9588d870c..5203c5a39b6 100644
--- a/src/vs/editor/test/browser/view/viewLayer.test.ts
+++ b/src/vs/editor/test/browser/view/viewLayer.test.ts
@@ -45,7 +45,7 @@ suite('RenderedLinesCollection onLinesDeleted', () => {
 	ensureNoDisposablesAreLeakedInTestSuite();
 
 	function testOnModelLinesDeleted(deleteFromLineNumber: number, deleteToLineNumber: number, expectedDeleted: string[], expectedState: ILinesCollectionState): void {
-		const col = new RenderedLinesCollection<TestLine>(() => new TestLine('new'));
+		const col = new RenderedLinesCollection<TestLine>({ createLine: () => new TestLine('new') });
 		col._set(6, [
 			new TestLine('old6'),
 			new TestLine('old7'),
@@ -322,7 +322,7 @@ suite('RenderedLinesCollection onLineChanged', () => {
 	ensureNoDisposablesAreLeakedInTestSuite();
 
 	function testOnModelLineChanged(changedLineNumber: number, expectedPinged: boolean, expectedState: ILinesCollectionState): void {
-		const col = new RenderedLinesCollection<TestLine>(() => new TestLine('new'));
+		const col = new RenderedLinesCollection<TestLine>({ createLine: () => new TestLine('new') });
 		col._set(6, [
 			new TestLine('old6'),
 			new TestLine('old7'),