diff --git a/src/pylorax/__init__.py b/src/pylorax/__init__.py
index 42d6950e..0bc35a9a 100644
--- a/src/pylorax/__init__.py
+++ b/src/pylorax/__init__.py
@@ -145,7 +145,7 @@ class Lorax:
 
         return ret_arch
 
-    def _collectRepos(self, repos):
+    def __collectRepos(self, repos):
         """_collectRepos(repos)
 
         Get the main repo (the first one) and then build a list of all remaining
@@ -176,7 +176,7 @@ class Lorax:
 
         return repo, extrarepos
 
-    def _initializeDirs(self):
+    def __initializeDirs(self):
         """_initializeDirs()
 
         Create directories used for image generation.
@@ -199,7 +199,7 @@ class Lorax:
 
         return buildinstdir, treedir, cachedir
 
-    def _writeYumConf(self):
+    def __writeYumConf(self):
         """_writeYumConf()
 
         Generate a temporary yum.conf file for image generation.  Returns the path
diff --git a/src/pylorax/instroot.py b/src/pylorax/instroot.py
index 0e02b608..42831ace 100644
--- a/src/pylorax/instroot.py
+++ b/src/pylorax/instroot.py
@@ -80,7 +80,7 @@ class InstRoot:
         # scrub instroot
         self._scrubInstRoot()
 
-    def _getPackageList(self):
+    def __getPackageList(self):
         packages = set()
 
         packages_files = []
@@ -112,7 +112,7 @@ class InstRoot:
         return packages
 
     # Call yummain to install the list of packages to destdir
-    def _installPackages(self):
+    def __installPackages(self):
         # build the list of arguments to pass to yum
         arglist = ['-c', self.yumconf]
         arglist.append("--installroot=%s" % (self.destdir,))
@@ -131,7 +131,7 @@ class InstRoot:
         errcode = yummain.user_main(arglist, exit_code=False)
 
     # Scrub the instroot tree (remove files we don't want, modify settings, etc)
-    def _scrubInstRoot(self):
+    def __scrubInstRoot(self):
         print
 
         # drop custom configuration files in to the instroot