diff --git a/certbot_haproxy/installer.py b/certbot_haproxy/installer.py
index bfdf1f9..47eb149 100644
--- a/certbot_haproxy/installer.py
+++ b/certbot_haproxy/installer.py
@@ -523,7 +523,7 @@ class HAProxyInstaller(common.Plugin):
                     contents = pem.read()
                     if self._cert_key_check(contents, filepath):
                         yield (filepath, filepath, self.conf("haproxy-config"))
-            except IOError, err:
+            except IOError as err:
                 logger.error(
                     "Can't access \"%s\", reason:\n  %s",
                     filepath,
@@ -544,7 +544,7 @@ class HAProxyInstaller(common.Plugin):
         except TypeError:
             logger.warn("Could not read certificate, wrong type (not PEM)")
         # Documentation says it raises "Error"
-        except Exception, err:  # pylint: disable=broad-except
+        except Exception as err:  # pylint: disable=broad-except
             logger.error("Unexpected error! %s", err)
 
         if issuer == self.conf('haproxy-ca-common-name') and key.check():
diff --git a/certbot_haproxy/tests/__init__.py b/certbot_haproxy/tests/__init__.py
index 09efe79..39c364b 100644
--- a/certbot_haproxy/tests/__init__.py
+++ b/certbot_haproxy/tests/__init__.py
@@ -1,4 +1,5 @@
 """Certbot HAProxy Tests"""
+from __future__ import print_function
 import unittest
 
 
@@ -6,7 +7,7 @@ def load_tests(loader, tests, pattern=None):
     """Find all python files in the tests folder"""
     if pattern is None:
         pattern = 'test_*.py'
-    print "loader: ", loader
+    print("loader: ", loader)
 
     suite = loader.discover('certbot_haproxy/tests', pattern=pattern)
     suite.addTests(tests)