diff --git a/epuharness/fixture.py b/epuharness/fixture.py
index 5c7c5e9..5943b48 100644
--- a/epuharness/fixture.py
+++ b/epuharness/fixture.py
@@ -1,3 +1,4 @@
+import os
 import tempfile
 from socket import timeout
 
@@ -105,7 +106,8 @@ def make_fake_libcloud_site(self):
         Also creates an instance of the MockEC2NodeDriver for convenience
         """
         from epu.mocklibcloud import MockEC2NodeDriver
-        _, self.fake_libcloud_db = tempfile.mkstemp()
+        fh, self.fake_libcloud_db = tempfile.mkstemp()
+        os.close(fh)
         site_name = 'ec2-fake'
         fake_site = {
             'name': site_name,
diff --git a/epuharness/harness.py b/epuharness/harness.py
index e2c1ca4..ac2f6a6 100644
--- a/epuharness/harness.py
+++ b/epuharness/harness.py
@@ -236,6 +236,7 @@ def _build_phantom_authz_file(self, users):
             pw_file_contents += "%s\n%s\n" % (user.get('user', ''), user.get('password', ''))
 
         (os_handle, pw_filename) = tempfile.mkstemp()
+        os.close(os_handle)
         with open(pw_filename, "w") as pw_f:
             pw_f.write(pw_file_contents)
 
@@ -269,6 +270,7 @@ def _build_phantom_config(self, name, exchange, config, authz_file, logfile=None
         config_yaml = yaml.dump(merged_config)
 
         (os_handle, config_filename) = tempfile.mkstemp(suffix='.yml')
+        os.close(os_handle)
         with open(config_filename, "w") as config_f:
             config_f.write(config_yaml)
 
@@ -340,6 +342,7 @@ def _build_epum_config(self, name, exchange, config, logfile=None, instance=None
         config_yaml = yaml.dump(merged_config)
 
         (os_handle, config_filename) = tempfile.mkstemp(suffix='.yml')
+        os.close(os_handle)
         with open(config_filename, "w") as config_f:
             config_f.write(config_yaml)
 
@@ -415,6 +418,7 @@ def _build_provisioner_config(self, name, exchange, config, logfile=None, instan
         config_yaml = yaml.dump(merged_config)
 
         (os_handle, config_filename) = tempfile.mkstemp(suffix='.yml')
+        os.close(os_handle)
         with open(config_filename, "w") as config_f:
             config_f.write(config_yaml)
 
@@ -485,6 +489,7 @@ def _build_dtrs_config(self, name, exchange, config, logfile=None, instance=None
         config_yaml = yaml.dump(merged_config)
 
         (os_handle, config_filename) = tempfile.mkstemp(suffix='.yml')
+        os.close(os_handle)
         with open(config_filename, "w") as config_f:
             config_f.write(config_yaml)
 
@@ -565,6 +570,7 @@ def _build_process_dispatcher_config(self, exchange, name, config,
         config_yaml = yaml.dump(merged_config)
 
         (os_handle, config_filename) = tempfile.mkstemp(prefix="%s_" % name, suffix='.yml')
+        os.close(os_handle)
         with open(config_filename, "w") as config_f:
             config_f.write(config_yaml)
 
@@ -680,6 +686,7 @@ def _build_eeagent_config(self, exchange, name, process_dispatcher,
         config_yaml = yaml.dump(config)
 
         (os_handle, config_filename) = tempfile.mkstemp(suffix='.yml')
+        os.close(os_handle)
         with open(config_filename, "w") as config_f:
             config_f.write(config_yaml)
 
@@ -817,6 +824,7 @@ def _start_rel(self, name=None, module=None, cls=None, config=None,
         rel_yaml = yaml.dump(rel)
 
         (os_handle, rel_filename) = tempfile.mkstemp(suffix='.yml')
+        os.close(os_handle)
         with open(rel_filename, "w") as rel_f:
             rel_f.write(rel_yaml)