diff --git a/.travis.yml b/.travis.yml
index c9ad822c..0d6a22b7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,13 +1,26 @@
 language: go
 go:
  - 1.7
+
+sudo: false
+
+# Use trusty for postgres 9.5 support
+dist: trusty
+
+addons:
+  postgresql: "9.5"
+
+services:
+  - postgresql
+
 install:
  - go get github.com/constabulary/gb/...
  - go get github.com/golang/lint/golint
  - go get github.com/fzipp/gocyclo
+ - ./travis-install-kafka.sh
 
 script:
- - gb build github.com/matrix-org/dendrite/roomserver/roomserver && ./hooks/pre-commit
+ - ./travis-test.sh
 
 notifications:
     webhooks:
diff --git a/src/github.com/matrix-org/dendrite/roomserver/roomserver-integration-tests/main.go b/src/github.com/matrix-org/dendrite/roomserver/roomserver-integration-tests/main.go
new file mode 100644
index 00000000..06f22a2a
--- /dev/null
+++ b/src/github.com/matrix-org/dendrite/roomserver/roomserver-integration-tests/main.go
@@ -0,0 +1,340 @@
+package main
+
+import (
+	"fmt"
+	"github.com/matrix-org/gomatrixserverlib"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"time"
+)
+
+var (
+	// Path to where kafka is installed.
+	kafkaDir = defaulting(os.Getenv("KAFKA_DIR"), "kafka")
+	// The URI the kafka zookeeper is listening on.
+	zookeeperURI = defaulting(os.Getenv("ZOOKEEPER_URI"), "localhost:2181")
+	// The URI the kafka server is listening on.
+	kafkaURI = defaulting(os.Getenv("KAFKA_URIS"), "localhost:9092")
+	// How long to wait for the roomserver to write the expected output messages.
+	timeoutString = defaulting(os.Getenv("TIMEOUT"), "10s")
+	// The name of maintenance database to connect to in order to create the test database.
+	postgresDatabase = defaulting(os.Getenv("POSTGRES_DATABASE"), "postgres")
+	// The name of the test database to create.
+	testDatabaseName = defaulting(os.Getenv("DATABASE_NAME"), "roomserver_test")
+	// The postgres connection config for connecting to the test database.
+	testDatabase = defaulting(os.Getenv("DATABASE"), fmt.Sprintf("dbname=%s binary_parameters=yes", testDatabaseName))
+)
+
+func defaulting(value, defaultValue string) string {
+	if value == "" {
+		value = defaultValue
+	}
+	return value
+}
+
+var timeout time.Duration
+
+func init() {
+	var err error
+	timeout, err = time.ParseDuration(timeoutString)
+	if err != nil {
+		panic(err)
+	}
+}
+
+func createDatabase(database string) error {
+	cmd := exec.Command("psql", postgresDatabase)
+	cmd.Stdin = strings.NewReader(
+		fmt.Sprintf("DROP DATABASE IF EXISTS %s; CREATE DATABASE %s;", database, database),
+	)
+	// Send stdout and stderr to our stderr so that we see error messages from
+	// the psql process
+	cmd.Stdout = os.Stderr
+	cmd.Stderr = os.Stderr
+	return cmd.Run()
+}
+
+func createTopic(topic string) error {
+	cmd := exec.Command(
+		filepath.Join(kafkaDir, "bin", "kafka-topics.sh"),
+		"--create",
+		"--zookeeper", zookeeperURI,
+		"--replication-factor", "1",
+		"--partitions", "1",
+		"--topic", topic,
+	)
+	// Send stdout and stderr to our stderr so that we see error messages from
+	// the kafka process.
+	cmd.Stdout = os.Stderr
+	cmd.Stderr = os.Stderr
+	return cmd.Run()
+}
+
+func writeToTopic(topic string, data []string) error {
+	cmd := exec.Command(
+		filepath.Join(kafkaDir, "bin", "kafka-console-producer.sh"),
+		"--broker-list", kafkaURI,
+		"--topic", topic,
+	)
+	// Send stdout and stderr to our stderr so that we see error messages from
+	// the kafka process.
+	cmd.Stdout = os.Stderr
+	cmd.Stderr = os.Stderr
+	cmd.Stdin = strings.NewReader(strings.Join(data, "\n"))
+	return cmd.Run()
+}
+
+// runAndReadFromTopic runs a command and waits for a number of messages to be
+// written to a kafka topic. It returns if the command exits, the number of
+// messages is reached or after a timeout. It kills the command before it returns.
+// It returns a list of the messages read from the command on success or an error
+// on failure.
+func runAndReadFromTopic(runCmd *exec.Cmd, topic string, count int) ([]string, error) {
+	type result struct {
+		// data holds all of stdout on success.
+		data []byte
+		// err is set on failure.
+		err error
+	}
+	done := make(chan result)
+	readCmd := exec.Command(
+		filepath.Join(kafkaDir, "bin", "kafka-console-consumer.sh"),
+		"--bootstrap-server", kafkaURI,
+		"--topic", topic,
+		"--from-beginning",
+		"--max-messages", fmt.Sprintf("%d", count),
+	)
+	// Send stderr to our stderr so the user can see any error messages.
+	readCmd.Stderr = os.Stderr
+	// Run the command, read the messages and wait for a timeout in parallel.
+	go func() {
+		// Read all of stdout.
+		data, err := readCmd.Output()
+		done <- result{data, err}
+	}()
+	go func() {
+		err := runCmd.Run()
+		done <- result{nil, err}
+	}()
+	go func() {
+		time.Sleep(timeout)
+		done <- result{nil, fmt.Errorf("Timeout reading %d messages from topic %q", count, topic)}
+	}()
+	// Wait for one of the tasks to finsh.
+	r := <-done
+
+	// Kill both processes. We don't check if the processes are running and
+	// we ignore failures since we are just trying to clean up before returning.
+	runCmd.Process.Kill()
+	readCmd.Process.Kill()
+
+	if r.err != nil {
+		return nil, r.err
+	}
+
+	// The kafka console consumer writes a newline character after each message.
+	// So we split on newline characters
+	lines := strings.Split(string(r.data), "\n")
+	if len(lines) > 0 {
+		// Remove the blank line at the end of the data.
+		lines = lines[:len(lines)-1]
+	}
+	return lines, nil
+}
+
+func deleteTopic(topic string) error {
+	cmd := exec.Command(
+		filepath.Join(kafkaDir, "bin", "kafka-topics.sh"),
+		"--delete",
+		"--if-exists",
+		"--zookeeper", zookeeperURI,
+		"--topic", topic,
+	)
+	cmd.Stderr = os.Stderr
+	cmd.Stdout = os.Stderr
+	return cmd.Run()
+}
+
+func testRoomServer(input []string, wantOutput []string) {
+	const (
+		inputTopic  = "roomserverInput"
+		outputTopic = "roomserverOutput"
+	)
+	deleteTopic(inputTopic)
+	if err := createTopic(inputTopic); err != nil {
+		panic(err)
+	}
+	deleteTopic(outputTopic)
+	if err := createTopic(outputTopic); err != nil {
+		panic(err)
+	}
+
+	if err := writeToTopic(inputTopic, canonicalJSONInput(input)); err != nil {
+		panic(err)
+	}
+
+	if err := createDatabase(testDatabaseName); err != nil {
+		panic(err)
+	}
+
+	cmd := exec.Command(filepath.Join(filepath.Dir(os.Args[0]), "roomserver"))
+
+	// Append the roomserver config to the existing environment.
+	// We append to the environment rather than replacing so that any additional
+	// postgres and golang environment variables such as PGHOST are passed to
+	// the roomserver process.
+	cmd.Env = append(
+		os.Environ(),
+		fmt.Sprintf("DATABASE=%s", testDatabase),
+		fmt.Sprintf("KAFKA_URIS=%s", kafkaURI),
+		fmt.Sprintf("TOPIC_INPUT_ROOM_EVENT=%s", inputTopic),
+		fmt.Sprintf("TOPIC_OUTPUT_ROOM_EVENT=%s", outputTopic),
+	)
+	cmd.Stderr = os.Stderr
+
+	gotOutput, err := runAndReadFromTopic(cmd, outputTopic, 1)
+	if err != nil {
+		panic(err)
+	}
+
+	if len(wantOutput) != len(gotOutput) {
+		panic(fmt.Errorf("Wanted %d lines of output got %d lines", len(wantOutput), len(gotOutput)))
+	}
+
+	for i := range wantOutput {
+		if !equalJSON(wantOutput[i], gotOutput[i]) {
+			panic(fmt.Errorf("Wanted %q at index %d got %q", wantOutput[i], i, gotOutput[i]))
+		}
+	}
+}
+
+func canonicalJSONInput(jsonData []string) []string {
+	for i := range jsonData {
+		jsonBytes, err := gomatrixserverlib.CanonicalJSON([]byte(jsonData[i]))
+		if err != nil {
+			panic(err)
+		}
+		jsonData[i] = string(jsonBytes)
+	}
+	return jsonData
+}
+
+func equalJSON(a, b string) bool {
+	canonicalA, err := gomatrixserverlib.CanonicalJSON([]byte(a))
+	if err != nil {
+		panic(err)
+	}
+	canonicalB, err := gomatrixserverlib.CanonicalJSON([]byte(b))
+	if err != nil {
+		panic(err)
+	}
+	return string(canonicalA) == string(canonicalB)
+}
+
+func main() {
+	fmt.Println("==TESTING==", os.Args[0])
+
+	input := []string{
+		`{
+			"AuthEventIDs": [],
+			"Kind": 1,
+			"Event": {
+				"origin": "matrix.org",
+				"signatures": {
+					"matrix.org": {
+						"ed25519:auto": "3kXGwNtdj+zqEXlI8PWLiB76xtrQ7SxcvPuXAEVCTo+QPoBoUvLi1RkHs6O5mDz7UzIowK5bi1seAN4vOh0OBA"
+					}
+				},
+				"origin_server_ts": 1463671337837,
+				"sender": "@richvdh:matrix.org",
+				"event_id": "$1463671337126266wrSBX:matrix.org",
+				"prev_events": [],
+				"state_key": "",
+				"content": {"creator": "@richvdh:matrix.org"},
+				"depth": 1,
+				"prev_state": [],
+				"room_id": "!HCXfdvrfksxuYnIFiJ:matrix.org",
+				"auth_events": [],
+				"hashes": {"sha256": "Q05VLC8nztN2tguy+KnHxxhitI95wK9NelnsDaXRqeo"},
+				"type": "m.room.create"}
+		}`, `{
+			"AuthEventIDs": ["$1463671337126266wrSBX:matrix.org"],
+			"Kind": 2,
+			"StateEventIDs": ["$1463671337126266wrSBX:matrix.org"],
+			"Event": {
+				"origin": "matrix.org",
+				"signatures": {
+					"matrix.org": {
+						"ed25519:auto": "a2b3xXYVPPFeG1sHCU3hmZnAaKqZFgzGZozijRGblG5Y//ewRPAn1A2mCrI2UM5I+0zqr70cNpHgF8bmNFu4BA"
+					}
+				},
+				"origin_server_ts": 1463671339844,
+				"sender": "@richvdh:matrix.org",
+				"event_id": "$1463671339126270PnVwC:matrix.org",
+				"prev_events": [[
+					"$1463671337126266wrSBX:matrix.org", {"sha256": "h/VS07u8KlMwT3Ee8JhpkC7sa1WUs0Srgs+l3iBv6c0"}
+				]],
+				"membership": "join",
+				"state_key": "@richvdh:matrix.org",
+				"content": {
+					"membership": "join",
+					"avatar_url": "mxc://matrix.org/ZafPzsxMJtLaSaJXloBEKiws",
+					"displayname": "richvdh"
+				},
+				"depth": 2,
+				"prev_state": [],
+				"room_id": "!HCXfdvrfksxuYnIFiJ:matrix.org",
+				"auth_events": [[
+					"$1463671337126266wrSBX:matrix.org", {"sha256": "h/VS07u8KlMwT3Ee8JhpkC7sa1WUs0Srgs+l3iBv6c0"}
+				]],
+				"hashes": {"sha256": "t9t3sZV1Eu0P9Jyrs7pge6UTa1zuTbRdVxeUHnrQVH0"},
+				"type": "m.room.member"},
+			"HasState": true
+		}`,
+	}
+
+	want := []string{
+		`{
+			"Event":{
+				"auth_events":[[
+					"$1463671337126266wrSBX:matrix.org",{"sha256":"h/VS07u8KlMwT3Ee8JhpkC7sa1WUs0Srgs+l3iBv6c0"}
+				]],
+				"content":{
+					"avatar_url":"mxc://matrix.org/ZafPzsxMJtLaSaJXloBEKiws",
+					"displayname":"richvdh",
+					"membership":"join"
+				},
+				"depth": 2,
+				"event_id": "$1463671339126270PnVwC:matrix.org",
+				"hashes": {"sha256":"t9t3sZV1Eu0P9Jyrs7pge6UTa1zuTbRdVxeUHnrQVH0"},
+				"membership": "join",
+				"origin": "matrix.org",
+				"origin_server_ts": 1463671339844,
+				"prev_events": [[
+					"$1463671337126266wrSBX:matrix.org",{"sha256":"h/VS07u8KlMwT3Ee8JhpkC7sa1WUs0Srgs+l3iBv6c0"}
+				]],
+				"prev_state":[],
+				"room_id":"!HCXfdvrfksxuYnIFiJ:matrix.org",
+				"sender":"@richvdh:matrix.org",
+				"signatures":{
+					"matrix.org":{
+						"ed25519:auto":"a2b3xXYVPPFeG1sHCU3hmZnAaKqZFgzGZozijRGblG5Y//ewRPAn1A2mCrI2UM5I+0zqr70cNpHgF8bmNFu4BA"
+					}
+				},
+				"state_key":"@richvdh:matrix.org",
+				"type":"m.room.member"
+			},
+			"VisibilityEventIDs":null,
+			"LatestEventIDs":["$1463671339126270PnVwC:matrix.org"],
+			"AddsStateEventIDs":null,
+			"RemovesStateEventIDs":null,
+			"LastSentEventID":""
+		}`,
+	}
+
+	testRoomServer(input, want)
+
+	fmt.Println("==PASSED==", os.Args[0])
+}
diff --git a/travis-install-kafka.sh b/travis-install-kafka.sh
new file mode 100755
index 00000000..20855fcc
--- /dev/null
+++ b/travis-install-kafka.sh
@@ -0,0 +1,22 @@
+# /bin/bash
+
+set -eu
+
+# The mirror to download kafka from is picked from the list of mirrors at
+# https://www.apache.org/dyn/closer.cgi?path=/kafka/0.10.2.0/kafka_2.11-0.10.2.0.tgz
+# TODO: Check the signature since we are downloading over HTTP.
+MIRROR=http://mirror.ox.ac.uk/sites/rsync.apache.org/kafka/0.10.2.0/kafka_2.11-0.10.2.0.tgz
+
+# Only download the kafka if it isn't already downloaded.
+test -f kafka.tgz || wget $MIRROR -O kafka.tgz
+# Unpack the kafka over the top of any existing installation
+mkdir -p kafka && tar xzf kafka.tgz -C kafka --strip-components 1
+# Start the zookeeper running in the background.
+# By default the zookeeper listens on localhost:2181
+kafka/bin/zookeeper-server-start.sh -daemon kafka/config/zookeeper.properties
+# Enable topic deletion so that the integration tests can create a fresh topic
+# for each test run.
+echo "delete.topic.enable=true" >> kafka/config/server.properties
+# Start the kafka server running in the background.
+# By default the kafka listens on localhost:9092
+kafka/bin/kafka-server-start.sh -daemon kafka/config/server.properties
diff --git a/travis-test.sh b/travis-test.sh
new file mode 100755
index 00000000..b3ed18cf
--- /dev/null
+++ b/travis-test.sh
@@ -0,0 +1,13 @@
+#! /bin/bash
+
+set -eu
+
+# Check that the servers build
+gb build github.com/matrix-org/dendrite/roomserver/roomserver
+gb build github.com/matrix-org/dendrite/roomserver/roomserver-integration-tests
+
+# Run the pre commit hooks
+./hooks/pre-commit
+
+# Run the integration tests
+bin/roomserver-integration-tests