diff --git a/test/fixtures/azure-fixture/Dockerfile b/test/fixtures/azure-fixture/Dockerfile
index 30faed47732..763a81761cd 100644
--- a/test/fixtures/azure-fixture/Dockerfile
+++ b/test/fixtures/azure-fixture/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 RUN apt-get update -qqy
 RUN apt-get install -qqy openjdk-12-jre-headless
 ENTRYPOINT exec java -classpath "/fixture/shared/*" fixture.azure.AzureHttpFixture 0.0.0.0 8091 container
diff --git a/test/fixtures/gcs-fixture/Dockerfile b/test/fixtures/gcs-fixture/Dockerfile
index daae63295b6..52e0d31888f 100644
--- a/test/fixtures/gcs-fixture/Dockerfile
+++ b/test/fixtures/gcs-fixture/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 
 RUN apt-get update -qqy
 RUN apt-get install -qqy openjdk-12-jre-headless
@@ -14,4 +14,4 @@ ENV GCS_FIXTURE_TOKEN=${token}
 ENTRYPOINT exec java -classpath "/fixture/shared/*" \
     fixture.gcs.GoogleCloudStorageHttpFixture 0.0.0.0 "$GCS_FIXTURE_PORT" "$GCS_FIXTURE_BUCKET" "$GCS_FIXTURE_TOKEN"
 
-EXPOSE $port
+EXPOSE $port
\ No newline at end of file
diff --git a/test/fixtures/s3-fixture/Dockerfile b/test/fixtures/s3-fixture/Dockerfile
index f24aa03505c..c1f2515ae35 100644
--- a/test/fixtures/s3-fixture/Dockerfile
+++ b/test/fixtures/s3-fixture/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:19.04
 
 RUN apt-get update -qqy
 RUN apt-get install -qqy openjdk-12-jre-headless
diff --git a/x-pack/test/smb-fixture/Dockerfile b/x-pack/test/smb-fixture/Dockerfile
index cfbc26f21df..bcd74758ff4 100644
--- a/x-pack/test/smb-fixture/Dockerfile
+++ b/x-pack/test/smb-fixture/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:16.04
 RUN apt-get update -qqy && apt-get install -qqy samba ldap-utils
 ADD . /fixture
 RUN chmod +x /fixture/src/main/resources/provision/installsmb.sh