diff --git a/libraries/stdlib/test/PreconditionsTest.kt b/libraries/stdlib/test/PreconditionsTest.kt
index a62746d4963..4af505558ca 100644
--- a/libraries/stdlib/test/PreconditionsTest.kt
+++ b/libraries/stdlib/test/PreconditionsTest.kt
@@ -17,14 +17,14 @@ class PreconditionsTest() {
         val error = assertFailsWith(IllegalArgumentException::class) {
             require(false)
         }
-        assertNotNull(error.getMessage())
+        assertNotNull(error.message)
     }
 
     @test fun failingRequireWithLazyMessage() {
         val error = assertFailsWith(IllegalArgumentException::class) {
             require(false) { "Hello" }
         }
-        assertEquals("Hello", error.getMessage())
+        assertEquals("Hello", error.message)
     }
 
     @test fun passingCheck() {
@@ -39,14 +39,14 @@ class PreconditionsTest() {
         val error = assertFailsWith(IllegalStateException::class) {
             check(false)
         }
-        assertNotNull(error.getMessage())
+        assertNotNull(error.message)
     }
 
     @test fun failingCheckWithLazyMessage() {
         val error = assertFailsWith(IllegalStateException::class) {
             check(false) { "Hello" }
         }
-        assertEquals("Hello", error.getMessage())
+        assertEquals("Hello", error.message)
     }
 
     @test fun requireNotNull() {
@@ -67,7 +67,7 @@ class PreconditionsTest() {
             val obj: Any? = null
             requireNotNull(obj) { "Message" }
         }
-        assertEquals("Message", error.getMessage())
+        assertEquals("Message", error.message)
 
         var lazyCalled: Boolean = false
         requireNotNull("not null") {
@@ -104,7 +104,7 @@ class PreconditionsTest() {
             assert(false)
         }
         if (error is AssertionError) {
-            assertEquals("Assertion failed", error.getMessage())
+            assertEquals("Assertion failed", error.message)
         } else {
             fail("Invalid exception type: " + error)
         }
@@ -115,7 +115,7 @@ class PreconditionsTest() {
             error("There was a problem")
         }
         if (error is IllegalStateException) {
-            assertEquals("There was a problem", error.getMessage())
+            assertEquals("There was a problem", error.message)
         } else {
             fail("Invalid exception type: " + error)
         }
@@ -130,7 +130,7 @@ class PreconditionsTest() {
             assert(false) { "Hello" }
         }
         if (error is AssertionError) {
-            assertEquals("Hello", error.getMessage())
+            assertEquals("Hello", error.message)
         } else {
             fail("Invalid exception type: " + error)
         }
@@ -141,7 +141,7 @@ class PreconditionsTest() {
             assert(false) { "Hello" }
         }
         if (error is AssertionError) {
-            assertEquals("Hello", error.getMessage())
+            assertEquals("Hello", error.message)
         } else {
             fail("Invalid exception type: " + error)
         }
diff --git a/libraries/stdlib/test/io/Files.kt b/libraries/stdlib/test/io/Files.kt
index 909fa730285..694d2c0d959 100644
--- a/libraries/stdlib/test/io/Files.kt
+++ b/libraries/stdlib/test/io/Files.kt
@@ -733,7 +733,7 @@ class FilesTest {
             srcFile.copyTo(dstFile)
             assert(false)
         } catch (e: FileAlreadyExistsException) {
-            println(e.getMessage())
+            println(e.message)
         }
 
         var len = srcFile.copyTo(dstFile, overwrite = true)
diff --git a/libraries/stdlib/test/test/TestJVMTest.kt b/libraries/stdlib/test/test/TestJVMTest.kt
index db6a583dea4..ce3678e1da7 100644
--- a/libraries/stdlib/test/test/TestJVMTest.kt
+++ b/libraries/stdlib/test/test/TestJVMTest.kt
@@ -11,7 +11,7 @@ class TestJVMTest {
             block()
         }
         catch (e: AssertionError) {
-            checkAssertion(e.getMessage())
+            checkAssertion(e.message)
             return
         }
         fail("Expected AssertionError to be thrown.")
diff --git a/libraries/stdlib/test/utils/TODOTest.kt b/libraries/stdlib/test/utils/TODOTest.kt
index 7aea131a54d..904452c9251 100644
--- a/libraries/stdlib/test/utils/TODOTest.kt
+++ b/libraries/stdlib/test/utils/TODOTest.kt
@@ -33,7 +33,7 @@ class TODOTest {
     private fun assertNotImplementedWithMessage(message: String, block: () -> Unit) {
         val e = assertFails(block)
         assertTrue(e is NotImplementedError)
-        assertTrue(message in e!!.getMessage()!!)
+        assertTrue(message in e!!.message!!)
     }