diff --git a/kotlin-native/backend.native/tests/stdlib_external/text/CharNativeTest.kt b/kotlin-native/backend.native/tests/stdlib_external/text/CharNativeTest.kt
new file mode 100644
index 00000000000..7c83bb45077
--- /dev/null
+++ b/kotlin-native/backend.native/tests/stdlib_external/text/CharNativeTest.kt
@@ -0,0 +1,72 @@
+
+package test.text
+
+import kotlin.test.*
+
+class CharNativeTest {
+
+    @Test
+    fun lowercaseChar() {
+        // large mapping
+        assertEquals('\u0239', '\u0239'.lowercaseChar())
+        assertEquals('\u2C65', '\u023A'.lowercaseChar())
+        assertEquals('\u023C', '\u023B'.lowercaseChar())
+
+        // large negative mapping
+        assertEquals('\u2C7D', '\u2C7D'.lowercaseChar())
+        assertEquals('\u023F', '\u2C7E'.lowercaseChar())
+        assertEquals('\u0240', '\u2C7F'.lowercaseChar())
+
+        // <Lu, Ll>
+        assertEquals('\u2C81', '\u2C80'.lowercaseChar())
+        assertEquals('\u2C81', '\u2C81'.lowercaseChar())
+        assertEquals('\u2C83', '\u2C82'.lowercaseChar())
+    }
+
+    @Test
+    fun uppercaseChar() {
+        // large mapping
+        assertEquals('\u029C', '\u029C'.uppercaseChar())
+        assertEquals('\uA7B2', '\u029D'.uppercaseChar())
+        assertEquals('\uA7B0', '\u029E'.uppercaseChar())
+        assertEquals('\u029F', '\u029F'.uppercaseChar())
+
+        // large negative mapping
+        assertEquals('\uAB6F', '\uAB6F'.uppercaseChar())
+        assertEquals('\u13A0', '\uAB70'.uppercaseChar())
+        assertEquals('\u13EF', '\uABBF'.uppercaseChar())
+        assertEquals('\uABC0', '\uABC0'.uppercaseChar())
+    }
+
+    @Test
+    fun titlecaseChar() {
+        // titlecaseChar == char && uppercaseChar != char
+        assertEquals('\u10CF'.uppercaseChar(), '\u10CF'.titlecaseChar())
+        for (char in '\u10D0'..'\u10FA') {
+            assertEquals(char, char.titlecaseChar())
+            assertNotEquals(char, char.uppercaseChar())
+        }
+        for (char in '\u10FB'..'\u10FC') {
+            assertEquals(char, char.titlecaseChar())
+            assertEquals(char, char.uppercaseChar())
+        }
+        for (char in '\u10FD'..'\u10FF') {
+            assertEquals(char, char.titlecaseChar())
+            assertNotEquals(char, char.uppercaseChar())
+        }
+        assertEquals('\u1100'.uppercaseChar(), '\u1100'.titlecaseChar())
+    }
+
+    @Test
+    fun lowercase() {
+        // LATIN CAPITAL LETTER I WITH DOT ABOVE
+        assertEquals("\u0069\u0307", '\u0130'.lowercase())
+    }
+
+    fun titlecase() {
+        // titlecase = titlecaseChar = char != uppercaseChar
+        assertEquals('\u10F0'.titlecaseChar().toString(), '\u10F0'.titlecase())
+        assertEquals('\u10F0', '\u10F0'.titlecaseChar())
+        assertNotEquals('\u10F0', '\u10F0'.uppercaseChar())
+    }
+}