diff --git a/default-treewalker-checks.xml b/default-treewalker-checks.xml
index 4c75318..9a58e5f 100644
--- a/default-treewalker-checks.xml
+++ b/default-treewalker-checks.xml
@@ -154,12 +154,12 @@
 <module name="ImportOrder">
   <property name="severity" value="error"/>
   <message key="import.ordering" value="Wrong order for {0} import. Use Ctrl+Shift+O (Eclipse) or Ctrl+Alt+O (Intellij) to sort imports. https://source.android.com/setup/code-style#order-import-statements"/>
-  <property name="groups" value="android, androidx, com.android, dalvik, com, dagger, gov, io, junit, junitparams, libcore, net, kotlin, org, perfetto, vendor, java, javax"/>
+  <property name="groups" value="android, androidx, com.android, dalvik, com, dagger, gov, io, junit, junitparams, libcore, net, kotlin, kotlinx, org, perfetto, vendor, java, javax"/>
   <property name="ordered" value="true"/>
   <property name="option" value="top"/>
   <property name="separated" value="true"/>
   <property name="separatedStaticGroups" value="true"/>
-  <property name="staticGroups" value="android, androidx, com.android, dalvik, com, dagger, gov, io, junit, junitparams, libcore, net, kotlin, org, perfetto, java, javax"/>
+  <property name="staticGroups" value="android, androidx, com.android, dalvik, com, dagger, gov, io, junit, junitparams, libcore, net, kotlin, kotlinx, org, perfetto, java, javax"/>
 </module>
 <module name="Indentation">
   <property name="severity" value="error"/>