diff --git a/poky/meta/lib/oeqa/utils/buildproject.py b/poky/meta/lib/oeqa/utils/buildproject.py
index e6d80cc..dfb9661 100644
--- a/poky/meta/lib/oeqa/utils/buildproject.py
+++ b/poky/meta/lib/oeqa/utils/buildproject.py
@@ -18,6 +18,7 @@
     def __init__(self, uri, foldername=None, tmpdir=None, dl_dir=None):
         self.uri = uri
         self.archive = os.path.basename(uri)
+        self.tempdirobj = None
         if not tmpdir:
             self.tempdirobj = tempfile.TemporaryDirectory(prefix='buildproject-')
             tmpdir = self.tempdirobj.name
@@ -57,6 +58,8 @@
         return self._run('cd %s; make install %s' % (self.targetdir, install_args))
 
     def clean(self):
+        if self.tempdirobj:
+            self.tempdirobj.cleanup()
         if not self.needclean:
              return
         self._run('rm -rf %s' % self.targetdir)
diff --git a/poky/meta/lib/oeqa/utils/qemurunner.py b/poky/meta/lib/oeqa/utils/qemurunner.py
index d55248c..d961a9a 100644
--- a/poky/meta/lib/oeqa/utils/qemurunner.py
+++ b/poky/meta/lib/oeqa/utils/qemurunner.py
@@ -265,7 +265,7 @@
             r = os.fdopen(r)
             x = r.read()
             os.killpg(os.getpgid(self.runqemu.pid), signal.SIGTERM)
-            sys.exit(0)
+            os._exit(0)
 
         self.logger.debug("runqemu started, pid is %s" % self.runqemu.pid)
         self.logger.debug("waiting at most %s seconds for qemu pid (%s)" %
diff --git a/poky/meta/lib/oeqa/utils/targetbuild.py b/poky/meta/lib/oeqa/utils/targetbuild.py
index 1055810..09738ad 100644
--- a/poky/meta/lib/oeqa/utils/targetbuild.py
+++ b/poky/meta/lib/oeqa/utils/targetbuild.py
@@ -19,6 +19,7 @@
         self.d = d
         self.uri = uri
         self.archive = os.path.basename(uri)
+        self.tempdirobj = None
         if not tmpdir:
             tmpdir = self.d.getVar('WORKDIR')
             if not tmpdir:
@@ -71,9 +72,10 @@
         return self._run('cd %s; make install %s' % (self.targetdir, install_args))
 
     def clean(self):
+        if self.tempdirobj:
+            self.tempdirobj.cleanup()
         self._run('rm -rf %s' % self.targetdir)
         subprocess.check_call('rm -f %s' % self.localarchive, shell=True)
-        pass
 
 class TargetBuildProject(BuildProject):