diff --git a/Makefile b/Makefile
index e82a7ec8..cbe55365 100644
--- a/Makefile
+++ b/Makefile
@@ -222,7 +222,6 @@ build-advancedserver: downloads/$(MQ_ARCHIVE) docker-version
 # Target-specific variable to add web server into devserver image
 build-devserver: MQ_PACKAGES=ibmmq-server ibmmq-java ibmmq-jre ibmmq-gskit ibmmq-msg-.* ibmmq-samples ibmmq-ams ibmmq-web
 build-devserver: downloads/$(MQ_ARCHIVE_DEV) docker-version
-	@test "$(shell uname -m)" = "x86_64" || (echo "Error: MQ Advanced for Developers is only available for x86_64 architecture" && exit 1)
 	$(info $(shell printf $(TITLE)"Build $(MQ_IMAGE_DEVSERVER_BASE)"$(END)))
 	$(call docker-build-mq,$(MQ_IMAGE_DEVSERVER_BASE),Dockerfile-server,$(MQ_ARCHIVE_DEV),"98102d16795c4263ad9ca075190a2d4d","IBM MQ Advanced for Developers (Non-Warranted)",$(MQ_VERSION))
 	docker build --tag $(MQ_IMAGE_DEVSERVER) --file incubating/mqadvanced-server-dev/Dockerfile .
diff --git a/cmd/runmqserver/mqconfig_linux.go b/cmd/runmqserver/mqconfig_linux.go
index d0ec357d..93434116 100644
--- a/cmd/runmqserver/mqconfig_linux.go
+++ b/cmd/runmqserver/mqconfig_linux.go
@@ -41,7 +41,8 @@ func checkFS(path string) error {
 		log.Println(err)
 		return nil
 	}
-	t := fsTypes[statfs.Type]
+	// Use a type conversion to make type an int64.  On s390x it's a uint32.
+	t := fsTypes[int64(statfs.Type)]
 	switch t {
 	case "aufs", "overlayfs", "tmpfs":
 		return fmt.Errorf("%v uses unsupported filesystem type: %v", path, t)
diff --git a/incubating/Dockerfile-sfbridge b/incubating/Dockerfile-sfbridge
index 134cc4fa..3f7360f6 100644
--- a/incubating/Dockerfile-sfbridge
+++ b/incubating/Dockerfile-sfbridge
@@ -15,7 +15,7 @@
 FROM ubuntu:16.04
 
 # The URL to download the MQ installer from in tar.gz format
-ARG MQ_URL=https://public.dhe.ibm.com/ibmdl/export/pub/software/websphere/messaging/mqadv/mqadv_dev903_ubuntu_x86-64.tar.gz
+ARG MQ_URL=https://public.dhe.ibm.com/ibmdl/export/pub/software/websphere/messaging/mqadv/mqadv_dev905_ubuntu_x86-64.tar.gz
 
 # The MQ packages to install
 ARG MQ_PACKAGES="ibmmq-sfbridge"
diff --git a/incubating/mq-explorer/Dockerfile b/incubating/mq-explorer/Dockerfile
index 0deffcb2..32575d17 100644
--- a/incubating/mq-explorer/Dockerfile
+++ b/incubating/mq-explorer/Dockerfile
@@ -15,7 +15,7 @@
 FROM ubuntu:16.04
 
 # The URL to download the MQ installer from in tar.gz format
-ARG MQ_URL=https://public.dhe.ibm.com/ibmdl/export/pub/software/websphere/messaging/mqadv/mqadv_dev903_ubuntu_x86-64.tar.gz
+ARG MQ_URL=https://public.dhe.ibm.com/ibmdl/export/pub/software/websphere/messaging/mqadv/mqadv_dev905_ubuntu_x86-64.tar.gz
 
 # The MQ packages to install
 ARG MQ_PACKAGES="ibmmq-explorer"
@@ -35,4 +35,4 @@ ENV LANG=en_US.UTF-8
 # Run as mqm (999)
 USER 999
 
-ENTRYPOINT ["MQExplorer"]
\ No newline at end of file
+ENTRYPOINT ["MQExplorer"]
diff --git a/install-mq.sh b/install-mq.sh
index d8283492..f6179b74 100644
--- a/install-mq.sh
+++ b/install-mq.sh
@@ -29,12 +29,19 @@ fi
 
 if ($UBUNTU); then
   export DEBIAN_FRONTEND=noninteractive
+  source /etc/os-release
+  # Figure out the correct apt URL based on the CPU architecture
+  CPU_ARCH=$(uname -p)
+  if [ ${CPU_ARCH} == "x86_64" ]; then
+     APT_URL="http://archive.ubuntu.com/ubuntu/"
+  else
+     APT_URL="http://ports.ubuntu.com/ubuntu-ports/"
+  fi
   # Use a reduced set of apt repositories.
   # This ensures no unsupported code gets installed, and makes the build faster
-  source /etc/os-release
-  echo "deb http://archive.ubuntu.com/ubuntu/ ${UBUNTU_CODENAME} main restricted" > /etc/apt/sources.list
-  echo "deb http://archive.ubuntu.com/ubuntu/ ${UBUNTU_CODENAME}-updates main restricted" >> /etc/apt/sources.list
-  echo "deb http://archive.ubuntu.com/ubuntu/ ${UBUNTU_CODENAME}-security main restricted" >> /etc/apt/sources.list
+  echo "deb ${APT_URL} ${UBUNTU_CODENAME} main restricted" > /etc/apt/sources.list
+  echo "deb ${APT_URL} ${UBUNTU_CODENAME}-updates main restricted" >> /etc/apt/sources.list
+  echo "deb ${APT_URL} ${UBUNTU_CODENAME}-security main restricted" >> /etc/apt/sources.list
   # Install additional packages required by MQ, this install process and the runtime scripts
   apt-get update
   apt-get install -y --no-install-recommends \
diff --git a/test/docker/docker_api_test.go b/test/docker/docker_api_test.go
index f06fc7da..3fda0b4d 100644
--- a/test/docker/docker_api_test.go
+++ b/test/docker/docker_api_test.go
@@ -25,6 +25,7 @@ import (
 	"io"
 	"path/filepath"
 	"regexp"
+	"runtime"
 	"strconv"
 	"strings"
 	"testing"
@@ -104,7 +105,13 @@ func TestSecurityVulnerabilities(t *testing.T) {
 		t.Skip("Skipping test because container is not Ubuntu-based")
 	}
 	// Override the entrypoint to make "apt" only receive security updates, then check for updates
-	rc, log := runContainerOneShot(t, cli, "bash", "-c", "source /etc/os-release && echo \"deb http://security.ubuntu.com/ubuntu/ ${VERSION_CODENAME}-security main restricted\" > /etc/apt/sources.list && apt-get update 2>&1 >/dev/null && apt-get --simulate -qq upgrade")
+	var url string
+	if runtime.GOARCH == "amd64" {
+		url = "http://security.ubuntu.com/ubuntu/"
+	} else {
+		url = "http://ports.ubuntu.com/ubuntu-ports/"
+	}
+	rc, log := runContainerOneShot(t, cli, "bash", "-c", "source /etc/os-release && echo \"deb "+url+" ${VERSION_CODENAME}-security main restricted\" > /etc/apt/sources.list && apt-get update 2>&1 >/dev/null && apt-get --simulate -qq upgrade")
 	if rc != 0 {
 		t.Fatalf("Expected success, got %v", rc)
 	}
@@ -476,9 +483,11 @@ func TestErrorLogRotation(t *testing.T) {
 	for {
 		execContainer(t, cli, id, "fred", []string{"bash", "-c", "/opt/mqm/samp/bin/amqsput FAKE"})
 
-		_, derpaderp := execContainer(t, cli, id, "mqm", []string{"bash", "-c", "wc -c < " + filepath.Join(dir, "AMQERR02.json")})
-		amqerr02size, _ := strconv.Atoi(derpaderp)
-
+		_, atoiStr := execContainer(t, cli, id, "mqm", []string{"bash", "-c", "wc -c < " + filepath.Join(dir, "AMQERR02.json")})
+		amqerr02size, err := strconv.Atoi(atoiStr)
+		if err != nil {
+			t.Fatal(err)
+		}
 		if amqerr02size > 0 {
 			// We've done enough to cause log rotation
 			break
diff --git a/test/docker/docker_api_test_util.go b/test/docker/docker_api_test_util.go
index 264fb9d5..6993c219 100644
--- a/test/docker/docker_api_test_util.go
+++ b/test/docker/docker_api_test_util.go
@@ -325,9 +325,6 @@ rerun:
 		Detach: false,
 		Tty:    false,
 	})
-	if err != nil {
-		t.Fatal(err)
-	}
 	// Wait for the command to finish
 	var exitcode int
 	for {