Fix kotlin dev test failure

Change-Id: I7edd59e9c116787b0d0559377c044e49e1aedc88
diff --git a/src/test/java/com/android/tools/r8/rewrite/assertions/kotlinassertionhandlersimple/AssertionConfigurationAssertionHandlerKotlinSimpleTest.java b/src/test/java/com/android/tools/r8/rewrite/assertions/kotlinassertionhandlersimple/AssertionConfigurationAssertionHandlerKotlinSimpleTest.java
index 3798cfc..fdcb229 100644
--- a/src/test/java/com/android/tools/r8/rewrite/assertions/kotlinassertionhandlersimple/AssertionConfigurationAssertionHandlerKotlinSimpleTest.java
+++ b/src/test/java/com/android/tools/r8/rewrite/assertions/kotlinassertionhandlersimple/AssertionConfigurationAssertionHandlerKotlinSimpleTest.java
@@ -59,7 +59,7 @@
   @Override
   protected void configureR8(R8FullTestBuilder builder) {
     boolean referencesNotNull =
-        kotlinc.is(KotlinCompilerVersion.KOTLINC_1_6_0)
+        kotlinc.getCompilerVersion().isGreaterThanOrEqualTo(KotlinCompilerVersion.KOTLINC_1_6_0)
             && !kotlinStdlibAsLibrary
             && !useJvmAssertions;
     builder.applyIf(referencesNotNull, b -> b.addDontWarn("org.jetbrains.annotations.NotNull"));