diff --git a/hack/jenkins/common.sh b/hack/jenkins/common.sh
index 5121ed2f7108..ad44c3a23921 100755
--- a/hack/jenkins/common.sh
+++ b/hack/jenkins/common.sh
@@ -165,7 +165,7 @@ if type -P vboxmanage; then
     vboxmanage unregistervm "${guid}" || true
   done
 
-  ifaces=$(vboxmanage list hostonlyifs | grep -E "^Name:" | awk '{ printf $2 }')
+  ifaces=$(vboxmanage list hostonlyifs | grep -E "^Name:" | awk '{ print $2 }')
   for if in $ifaces; do
     vboxmanage hostonlyif remove "${if}" || true
   done
diff --git a/hack/jenkins/osx_integration_tests_virtualbox.sh b/hack/jenkins/osx_integration_tests_virtualbox.sh
index b4382058c90f..8f7c6e3dd0b8 100755
--- a/hack/jenkins/osx_integration_tests_virtualbox.sh
+++ b/hack/jenkins/osx_integration_tests_virtualbox.sh
@@ -30,6 +30,8 @@ VM_DRIVER="virtualbox"
 JOB_NAME="VirtualBox_macOS"
 EXTRA_ARGS="--bootstrapper=kubeadm"
 PARALLEL_COUNT=3
+# hyperkit behaves better, so it has higher precedence.
+# Assumes that hyperkit is also installed on the VirtualBox CI host.
 EXPECTED_DEFAULT_DRIVER="hyperkit"
 
 
diff --git a/pkg/minikube/driver/driver.go b/pkg/minikube/driver/driver.go
index 4222470a075d..a87d7a607120 100644
--- a/pkg/minikube/driver/driver.go
+++ b/pkg/minikube/driver/driver.go
@@ -111,6 +111,7 @@ func Choose(options []registry.DriverState) (registry.DriverState, []registry.Dr
 			continue
 		}
 		if ds.Priority > pick.Priority {
+			glog.V(1).Infof("%q has a higher priority (%d) than %q (%d)", ds.Name, ds.Priority, pick.Name, pick.Priority)
 			pick = ds
 		}
 	}
diff --git a/pkg/minikube/registry/drvs/none/none.go b/pkg/minikube/registry/drvs/none/none.go
index 3491b1909028..fa094f9aeaa8 100644
--- a/pkg/minikube/registry/drvs/none/none.go
+++ b/pkg/minikube/registry/drvs/none/none.go
@@ -1,3 +1,5 @@
+// +build linux
+
 /*
 Copyright 2018 The Kubernetes Authors All rights reserved.
 
diff --git a/pkg/minikube/registry/global.go b/pkg/minikube/registry/global.go
index 0d95cd8da363..97882296a540 100644
--- a/pkg/minikube/registry/global.go
+++ b/pkg/minikube/registry/global.go
@@ -17,6 +17,8 @@ limitations under the License.
 package registry
 
 import (
+	"os"
+
 	"github.com/golang/glog"
 )
 
@@ -54,12 +56,16 @@ func Driver(name string) DriverDef {
 // Installed returns a list of installed drivers in the global registry
 func Installed() []DriverState {
 	sts := []DriverState{}
+	glog.Infof("Querying for installed drivers using PATH=%s", os.Getenv("PATH"))
+
 	for _, d := range globalRegistry.List() {
 		if d.Status == nil {
 			glog.Errorf("%q does not implement Status", d.Name)
 			continue
 		}
 		s := d.Status()
+		glog.Infof("%s priority: %d, state: %+v", d.Name, d.Priority, s)
+
 		if !s.Installed {
 			glog.Infof("%q not installed: %v", d.Name, s.Error)
 			continue
diff --git a/test/integration/a_serial_test.go b/test/integration/a_serial_test.go
index 77f90fe56bc0..ae931662d707 100644
--- a/test/integration/a_serial_test.go
+++ b/test/integration/a_serial_test.go
@@ -40,6 +40,10 @@ func TestDownloadOnly(t *testing.T) {
 	ctx, cancel := context.WithTimeout(context.Background(), 15*time.Minute)
 	defer Cleanup(t, profile, cancel)
 
+	// Stores the startup run result for later error messages
+	var rrr *RunResult
+	var err error
+
 	t.Run("group", func(t *testing.T) {
 		versions := []string{
 			constants.OldestKubernetesVersion,
@@ -51,7 +55,14 @@ func TestDownloadOnly(t *testing.T) {
 				// Explicitly does not pass StartArgs() to test driver default
 				// --force to avoid uid check
 				args := []string{"start", "--download-only", "-p", profile, "--force", "--alsologtostderr", fmt.Sprintf("--kubernetes-version=%s", v)}
-				rrr, err := Run(t, exec.CommandContext(ctx, Target(), args...))
+
+				// Preserve the initial run-result for debugging
+				if rrr == nil {
+					rrr, err = Run(t, exec.CommandContext(ctx, Target(), args...))
+				} else {
+					_, err = Run(t, exec.CommandContext(ctx, Target(), args...))
+				}
+
 				if err != nil {
 					t.Errorf("%s failed: %v", args, err)
 				}
@@ -74,34 +85,36 @@ func TestDownloadOnly(t *testing.T) {
 						t.Errorf("expected the file for binary exist at %q but got error %v", fp, err)
 					}
 				}
+			})
+		}
 
-				// Checking if the default driver meets expectations
-				if ExpectedDefaultDriver() == "" {
-					t.Logf("--expected-default-driver=%q, continuing", ExpectedDefaultDriver())
-					return
-				}
-				rr, err := Run(t, exec.CommandContext(ctx, Target(), "profile", "list", "--output", "json"))
-				if err != nil {
-					t.Errorf("%s failed: %v", rr.Args, err)
-				}
-				var ps map[string][]config.Profile
-				err = json.Unmarshal(rr.Stdout.Bytes(), &ps)
-				if err != nil {
-					t.Errorf("%s failed: %v", rr.Args, err)
-				}
+		// Check that the profile we've created has the expected driver
+		t.Run("ExpectedDefaultDriver", func(t *testing.T) {
+			if ExpectedDefaultDriver() == "" {
+				t.Skipf("--expected-default-driver is unset, skipping test")
+				return
+			}
+			rr, err := Run(t, exec.CommandContext(ctx, Target(), "profile", "list", "--output", "json"))
+			if err != nil {
+				t.Errorf("%s failed: %v", rr.Args, err)
+			}
+			var ps map[string][]config.Profile
+			err = json.Unmarshal(rr.Stdout.Bytes(), &ps)
+			if err != nil {
+				t.Errorf("%s failed: %v", rr.Args, err)
+			}
 
-				got := ""
-				for _, p := range ps["valid"] {
-					if p.Name == profile {
-						got = p.Config.MachineConfig.VMDriver
-					}
+			got := ""
+			for _, p := range ps["valid"] {
+				if p.Name == profile {
+					got = p.Config.MachineConfig.VMDriver
 				}
+			}
 
-				if got != ExpectedDefaultDriver() {
-					t.Errorf("got driver %q, expected %q\nstart output: %s", got, ExpectedDefaultDriver(), rrr.Output())
-				}
-			})
-		}
+			if got != ExpectedDefaultDriver() {
+				t.Errorf("got driver %q, expected %q\nstart output: %s", got, ExpectedDefaultDriver(), rrr.Output())
+			}
+		})
 
 		// This is a weird place to test profile deletion, but this test is serial, and we have a profile to delete!
 		t.Run("DeleteAll", func(t *testing.T) {