diff --git a/buildSrc/src/main/java/org/elasticsearch/gradle/test/DistroTestPlugin.java b/buildSrc/src/main/java/org/elasticsearch/gradle/test/DistroTestPlugin.java
index 37c87f0969cb3..75fe8157c0f8a 100644
--- a/buildSrc/src/main/java/org/elasticsearch/gradle/test/DistroTestPlugin.java
+++ b/buildSrc/src/main/java/org/elasticsearch/gradle/test/DistroTestPlugin.java
@@ -287,8 +287,7 @@ private static TaskProvider<Copy> configureCopyUpgradeTask(Project project, Vers
             Path upgradePath = upgradeDir.get().getAsFile().toPath();
 
             // write bwc version, and append -SNAPSHOT if it is an unreleased version
-            ExtraPropertiesExtension extraProperties = project.getExtensions().getByType(ExtraPropertiesExtension.class);
-            BwcVersions bwcVersions = (BwcVersions) extraProperties.get("bwcVersions");
+            BwcVersions bwcVersions = BuildParams.getBwcVersions();
             final String upgradeFromVersion;
             if (bwcVersions.unreleasedInfo(upgradeVersion) != null) {
                 upgradeFromVersion = upgradeVersion.toString() + "-SNAPSHOT";