diff --git a/client/gc_test.go b/client/gc_test.go
index 8ae97a3cc..cc3e7aa27 100644
--- a/client/gc_test.go
+++ b/client/gc_test.go
@@ -4,12 +4,20 @@ import (
 	"log"
 	"os"
 	"testing"
+	"time"
 
 	"github.com/hashicorp/nomad/client/stats"
 	"github.com/hashicorp/nomad/nomad/mock"
 	"github.com/hashicorp/nomad/nomad/structs"
 )
 
+var gcConfig = GCConfig{
+	DiskUsageThreshold:  80,
+	InodeUsageThreshold: 70,
+	Interval:            1 * time.Minute,
+	ReservedDiskMB:      0,
+}
+
 func TestIndexedGCAllocPQ(t *testing.T) {
 	pq := NewIndexedGCAllocPQ()
 
@@ -83,7 +91,7 @@ func (m *MockStatsCollector) Stats() *stats.HostStats {
 
 func TestAllocGarbageCollector_MarkForCollection(t *testing.T) {
 	logger := log.New(os.Stdout, "", 0)
-	gc := NewAllocGarbageCollector(logger, &MockStatsCollector{}, 0)
+	gc := NewAllocGarbageCollector(logger, &MockStatsCollector{}, &gcConfig)
 
 	_, ar1 := testAllocRunnerFromAlloc(mock.Alloc(), false)
 	if err := gc.MarkForCollection(ar1); err != nil {
@@ -98,7 +106,7 @@ func TestAllocGarbageCollector_MarkForCollection(t *testing.T) {
 
 func TestAllocGarbageCollector_Collect(t *testing.T) {
 	logger := log.New(os.Stdout, "", 0)
-	gc := NewAllocGarbageCollector(logger, &MockStatsCollector{}, 0)
+	gc := NewAllocGarbageCollector(logger, &MockStatsCollector{}, &gcConfig)
 
 	_, ar1 := testAllocRunnerFromAlloc(mock.Alloc(), false)
 	_, ar2 := testAllocRunnerFromAlloc(mock.Alloc(), false)
@@ -120,7 +128,7 @@ func TestAllocGarbageCollector_Collect(t *testing.T) {
 
 func TestAllocGarbageCollector_CollectAll(t *testing.T) {
 	logger := log.New(os.Stdout, "", 0)
-	gc := NewAllocGarbageCollector(logger, &MockStatsCollector{}, 0)
+	gc := NewAllocGarbageCollector(logger, &MockStatsCollector{}, &gcConfig)
 
 	_, ar1 := testAllocRunnerFromAlloc(mock.Alloc(), false)
 	_, ar2 := testAllocRunnerFromAlloc(mock.Alloc(), false)
@@ -143,7 +151,8 @@ func TestAllocGarbageCollector_CollectAll(t *testing.T) {
 func TestAllocGarbageCollector_MakeRoomForAllocations_EnoughSpace(t *testing.T) {
 	logger := log.New(os.Stdout, "", 0)
 	statsCollector := &MockStatsCollector{}
-	gc := NewAllocGarbageCollector(logger, statsCollector, 20)
+	gcConfig.ReservedDiskMB = 20
+	gc := NewAllocGarbageCollector(logger, statsCollector, &gcConfig)
 
 	_, ar1 := testAllocRunnerFromAlloc(mock.Alloc(), false)
 	close(ar1.waitCh)
@@ -179,7 +188,8 @@ func TestAllocGarbageCollector_MakeRoomForAllocations_EnoughSpace(t *testing.T)
 func TestAllocGarbageCollector_MakeRoomForAllocations_GC_Partial(t *testing.T) {
 	logger := log.New(os.Stdout, "", 0)
 	statsCollector := &MockStatsCollector{}
-	gc := NewAllocGarbageCollector(logger, statsCollector, 20)
+	gcConfig.ReservedDiskMB = 20
+	gc := NewAllocGarbageCollector(logger, statsCollector, &gcConfig)
 
 	_, ar1 := testAllocRunnerFromAlloc(mock.Alloc(), false)
 	close(ar1.waitCh)
@@ -216,7 +226,8 @@ func TestAllocGarbageCollector_MakeRoomForAllocations_GC_Partial(t *testing.T) {
 func TestAllocGarbageCollector_MakeRoomForAllocations_GC_All(t *testing.T) {
 	logger := log.New(os.Stdout, "", 0)
 	statsCollector := &MockStatsCollector{}
-	gc := NewAllocGarbageCollector(logger, statsCollector, 20)
+	gcConfig.ReservedDiskMB = 20
+	gc := NewAllocGarbageCollector(logger, statsCollector, &gcConfig)
 
 	_, ar1 := testAllocRunnerFromAlloc(mock.Alloc(), false)
 	close(ar1.waitCh)
@@ -249,7 +260,8 @@ func TestAllocGarbageCollector_MakeRoomForAllocations_GC_All(t *testing.T) {
 func TestAllocGarbageCollector_MakeRoomForAllocations_GC_Fallback(t *testing.T) {
 	logger := log.New(os.Stdout, "", 0)
 	statsCollector := &MockStatsCollector{}
-	gc := NewAllocGarbageCollector(logger, statsCollector, 20)
+	gcConfig.ReservedDiskMB = 20
+	gc := NewAllocGarbageCollector(logger, statsCollector, &gcConfig)
 
 	_, ar1 := testAllocRunnerFromAlloc(mock.Alloc(), false)
 	close(ar1.waitCh)
@@ -281,7 +293,8 @@ func TestAllocGarbageCollector_MakeRoomForAllocations_GC_Fallback(t *testing.T)
 func TestAllocGarbageCollector_UsageBelowThreshold(t *testing.T) {
 	logger := log.New(os.Stdout, "", 0)
 	statsCollector := &MockStatsCollector{}
-	gc := NewAllocGarbageCollector(logger, statsCollector, 20)
+	gcConfig.ReservedDiskMB = 20
+	gc := NewAllocGarbageCollector(logger, statsCollector, &gcConfig)
 
 	_, ar1 := testAllocRunnerFromAlloc(mock.Alloc(), false)
 	close(ar1.waitCh)
@@ -314,7 +327,8 @@ func TestAllocGarbageCollector_UsageBelowThreshold(t *testing.T) {
 func TestAllocGarbageCollector_UsedPercentThreshold(t *testing.T) {
 	logger := log.New(os.Stdout, "", 0)
 	statsCollector := &MockStatsCollector{}
-	gc := NewAllocGarbageCollector(logger, statsCollector, 20)
+	gcConfig.ReservedDiskMB = 20
+	gc := NewAllocGarbageCollector(logger, statsCollector, &gcConfig)
 
 	_, ar1 := testAllocRunnerFromAlloc(mock.Alloc(), false)
 	close(ar1.waitCh)
diff --git a/nomad/structs/config/vault_test.go b/nomad/structs/config/vault_test.go
index 29f7ea590..f92f1dde7 100644
--- a/nomad/structs/config/vault_test.go
+++ b/nomad/structs/config/vault_test.go
@@ -10,6 +10,7 @@ func TestVaultConfig_Merge(t *testing.T) {
 	c1 := &VaultConfig{
 		Enabled:              &falseValue,
 		Token:                "1",
+		Role:                 "1",
 		AllowUnauthenticated: &trueValue,
 		TaskTokenTTL:         "1",
 		Addr:                 "1",
@@ -24,6 +25,7 @@ func TestVaultConfig_Merge(t *testing.T) {
 	c2 := &VaultConfig{
 		Enabled:              &trueValue,
 		Token:                "2",
+		Role:                 "2",
 		AllowUnauthenticated: &falseValue,
 		TaskTokenTTL:         "2",
 		Addr:                 "2",
@@ -38,6 +40,7 @@ func TestVaultConfig_Merge(t *testing.T) {
 	e := &VaultConfig{
 		Enabled:              &trueValue,
 		Token:                "2",
+		Role:                 "2",
 		AllowUnauthenticated: &falseValue,
 		TaskTokenTTL:         "2",
 		Addr:                 "2",
diff --git a/website/source/docs/drivers/rkt.html.md b/website/source/docs/drivers/rkt.html.md
index eb8995012..b3efe62a4 100644
--- a/website/source/docs/drivers/rkt.html.md
+++ b/website/source/docs/drivers/rkt.html.md
@@ -73,16 +73,18 @@ The `rkt` driver supports the following configuration in the job spec:
 
 * `net` - (Optional) A list of networks to be used by the containers
 
-* `port_map` - (Optional) A key/value map of port to be used by the container.
-   port name in the image manifest file needs to be specified for the value. For example:
+* `port_map` - (Optional) A key/value map of ports used by the container. The
+   value is the port name specified in the image manifest file.  When running
+   Docker images with rkt the port names will be of the form `${PORT}-tcp`. See
+   [networking](#networking) below for more details.
 
-   ```
+   ```hcl
     port_map {
+            # If running a Docker image that exposes port 8080
             app = "8080-tcp"
     }
    ```
-
-   See below for more details.
+   
 
 * `debug` - (Optional) Enable rkt command debug option.