diff --git a/gradle.properties b/gradle.properties
index 8c689aef44f8..0eb391db94dc 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -6,3 +6,6 @@ options.forkOptions.memoryMaximumSize=2g
 # Disable duplicate project id detection
 # See https://docs.gradle.org/current/userguide/upgrading_version_6.html#duplicate_project_names_may_cause_publication_to_fail
 systemProp.org.gradle.dependency.duplicate.project.detection=false
+
+# Enforce the build to fail on deprecated gradle api usage
+systemProp.org.gradle.warning.mode=fail
diff --git a/x-pack/qa/smoke-test-plugins-ssl/build.gradle b/x-pack/qa/smoke-test-plugins-ssl/build.gradle
index 45aafa21cba1..cb0ba300d9cd 100644
--- a/x-pack/qa/smoke-test-plugins-ssl/build.gradle
+++ b/x-pack/qa/smoke-test-plugins-ssl/build.gradle
@@ -85,6 +85,7 @@ ext.expansions = [
 
 processTestResources {
   from(sourceSets.test.resources.srcDirs) {
+    duplicatesStrategy = DuplicatesStrategy.INCLUDE
     include '**/*.yml'
     inputs.properties(expansions)
     MavenFilteringHack.filter(it, expansions)
diff --git a/x-pack/qa/third-party/active-directory/build.gradle b/x-pack/qa/third-party/active-directory/build.gradle
index c85c392c09c8..e27acb61ce0b 100644
--- a/x-pack/qa/third-party/active-directory/build.gradle
+++ b/x-pack/qa/third-party/active-directory/build.gradle
@@ -10,6 +10,7 @@ testFixtures.useFixture ":x-pack:test:smb-fixture"
 
 // add test resources from security, so tests can use example certs
 processTestResources {
+  duplicatesStrategy = DuplicatesStrategy.INCLUDE
   from(project(xpackModule('core')).sourceSets.test.resources.srcDirs)
   from(project(xpackModule('security')).sourceSets.test.resources.srcDirs)
 }