diff --git a/packages/core/tests/api/custom-loader-test.ts b/packages/core/tests/api/custom-loader-test.ts
index d3f3420..3e3a6f3 100644
--- a/packages/core/tests/api/custom-loader-test.ts
+++ b/packages/core/tests/api/custom-loader-test.ts
@@ -10,7 +10,7 @@ describe('Testing API loadIcons', () => {
 	let prefixCounter = 0;
 	function nextPrefix(): string {
 		prefixCounter++;
-		return `loader-test-${prefixCounter < 10 ? '0' : ''}${prefixCounter}`;
+		return `CustomLoaderTest_${prefixCounter}`;
 	}
 
 	it('Custom async loader for multiple icons with loadIcon', () => {