diff --git a/poky/meta/classes/testsdk.bbclass b/poky/meta/classes/testsdk.bbclass
index 6981d40..458c3f4 100644
--- a/poky/meta/classes/testsdk.bbclass
+++ b/poky/meta/classes/testsdk.bbclass
@@ -23,7 +23,7 @@
                     'IMAGE_BASENAME': d.getVar("IMAGE_BASENAME"),
                     'IMAGE_PKGTYPE': d.getVar("IMAGE_PKGTYPE"),
                     'STARTTIME': d.getVar("DATETIME"),
-                    'HOST_DISTRO': ('-'.join(platform.linux_distribution())).replace(' ', '-'),
+                    'HOST_DISTRO': oe.lsb.distro_identifier().replace(' ', '-'),
                     'LAYERS': get_layers(d.getVar("BBLAYERS"))}
     return configuration
 get_sdk_configuration[vardepsexclude] = "DATETIME"
@@ -66,6 +66,14 @@
     host_pkg_manifest = OESDKTestContextExecutor._load_manifest(
         d.expand("${SDK_DEPLOY}/${TOOLCHAIN_OUTPUTNAME}.host.manifest"))
 
+    processes = d.getVar("TESTIMAGE_NUMBER_THREADS") or d.getVar("BB_NUMBER_THREADS")
+    if processes:
+        try:
+            import testtools, subunit
+        except ImportError:
+            bb.warn("Failed to import testtools or subunit, the testcases will run serially")
+            processes = None
+
     sdk_dir = d.expand("${WORKDIR}/testimage-sdk/")
     bb.utils.remove(sdk_dir, True)
     bb.utils.mkdirhier(sdk_dir)
@@ -89,7 +97,10 @@
             import traceback
             bb.fatal("Loading tests failed:\n%s" % traceback.format_exc())
 
-        result = tc.runTests()
+        if processes:
+            result = tc.runTests(processes=int(processes))
+        else:
+            result = tc.runTests()
 
         component = "%s %s" % (pn, OESDKTestContextExecutor.name)
         context_msg = "%s:%s" % (os.path.basename(tcname), os.path.basename(sdk_env))
@@ -179,6 +190,7 @@
             f.write('SSTATE_MIRRORS += " \\n file://.* file://%s/PATH"\n' % test_data.get('SSTATE_DIR'))
             f.write('SOURCE_MIRROR_URL = "file://%s"\n' % test_data.get('DL_DIR'))
             f.write('INHERIT += "own-mirrors"\n')
+            f.write('PREMIRRORS_prepend = " git://git.yoctoproject.org/.* git://%s/git2/git.yoctoproject.org.BASENAME \\n "\n' % test_data.get('DL_DIR'))
 
         # We need to do this in case we have a minimal SDK
         subprocess.check_output(". %s > /dev/null; devtool sdk-install meta-extsdk-toolchain" % \
@@ -218,3 +230,8 @@
 addtask testsdkext
 do_testsdkext[nostamp] = "1"
 
+python () {
+    if oe.types.boolean(d.getVar("TESTIMAGE_AUTO") or "False"):
+        bb.build.addtask("testsdk", None, "do_populate_sdk", d)
+        bb.build.addtask("testsdkext", None, "do_populate_sdk_ext", d)
+}