diff --git a/libraries/stdlib/test/StringTest.kt b/libraries/stdlib/test/StringTest.kt
index 34bd43da51a..f2db543a24c 100644
--- a/libraries/stdlib/test/StringTest.kt
+++ b/libraries/stdlib/test/StringTest.kt
@@ -66,13 +66,13 @@ class StringTest {
         assertEquals(s, list[0])
     }
 
-    fun testStartsWithChar() {
+    test fun testStartsWithChar() {
         assertTrue("abcd".startsWith('a'))
         assertFalse("abcd".startsWith('b'))
         assertFalse("".startsWith('a'))
     }
 
-    fun testEndsWithChar() {
+    test fun testEndsWithChar() {
         assertTrue("abcd".endsWith('d'))
         assertFalse("abcd".endsWith('b'))
         assertFalse("".endsWith('a'))