diff --git a/gradle.properties b/gradle.properties
index e433066a18..f5b22b3e51 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -6,7 +6,7 @@ projectUrl=https://github.com/grails/grails-testing-support
 githubSlug=grails/grails-testing-support
 githubBranch=3.0.x
 developers=Jeff Brown,James Kleeh
-grailsGradlePluginVersion=6.0.0-M2
+grailsGradlePluginVersion=6.0.0-M4
 grailsVersion=6.0.0-M2
 grailsDocsVersion=6.0.0-SNAPSHOT
 asyncVersion=4.0.0