diff --git a/confluent_server/confluent/certutil.py b/confluent_server/confluent/certutil.py
index a6119faa..3582a53a 100644
--- a/confluent_server/confluent/certutil.py
+++ b/confluent_server/confluent/certutil.py
@@ -15,7 +15,10 @@ def get_openssl_conf_location():
         raise Exception("Cannot find openssl config file")
 
 def get_ip_addresses():
-    lines = subprocess.check_output('ip addr'.split(' '), timeout=86400)
+    try:
+        lines = subprocess.check_output('ip addr'.split(' '), timeout=86400)
+    except TypeError:
+        lines = subprocess.check_output('ip addr'.split(' '))
     if not isinstance(lines, str):
         lines = lines.decode('utf8')
     for line in lines.split('\n'):
@@ -101,8 +104,12 @@ def assure_tls_ca():
         if e.errno != 17:
             raise
     shutil.copy2('/etc/confluent/tls/cacert.pem', fname)
-    hv = subprocess.check_output(
-        ['openssl', 'x509', '-in', '/etc/confluent/tls/cacert.pem', '-hash', '-noout'], timeout=86400)
+    try:
+        hv = subprocess.check_output(
+            ['openssl', 'x509', '-in', '/etc/confluent/tls/cacert.pem', '-hash', '-noout'], timeout=86400)
+    except TypeError:
+        hv = subprocess.check_output(
+            ['openssl', 'x509', '-in', '/etc/confluent/tls/cacert.pem', '-hash', '-noout'])
     if not isinstance(hv, str):
         hv = hv.decode('utf8')
     hv = hv.strip()
diff --git a/confluent_server/confluent/selfservice.py b/confluent_server/confluent/selfservice.py
index bc50c7a6..05616c32 100644
--- a/confluent_server/confluent/selfservice.py
+++ b/confluent_server/confluent/selfservice.py
@@ -217,7 +217,10 @@ def handle_request(env, start_response):
                         if ckeymap == 'n/a':
                             continue
                         keymap = ckeymap
-            tdc = subprocess.check_output(['timedatectl'], timeout=86400).split(b'\n')
+            try:
+                tdc = subprocess.check_output(['timedatectl'], timeout=86400).split(b'\n')
+            except TypeError:
+                tdc = subprocess.check_output(['timedatectl']).split(b'\n')
             for ent in tdc:
                 ent = ent.strip()
                 if ent.startswith(b'Time zone:'):
diff --git a/confluent_server/confluent/sshutil.py b/confluent_server/confluent/sshutil.py
index 8faa0692..dcdfc57f 100644
--- a/confluent_server/confluent/sshutil.py
+++ b/confluent_server/confluent/sshutil.py
@@ -43,7 +43,10 @@ def assure_agent():
     if agent_pid is None:
         try:
             agent_starting = True
-            sai = subprocess.check_output(['ssh-agent'], timeout=86400)
+            try:
+                sai = subprocess.check_output(['ssh-agent'], timeout=86400)
+            except TypeError:
+                sai = subprocess.check_output(['ssh-agent'])
             for line in sai.split(b'\n'):
                 if b';' not in line:
                     continue
diff --git a/confluent_server/confluent/syncfiles.py b/confluent_server/confluent/syncfiles.py
index 46aebafd..a02d03ed 100644
--- a/confluent_server/confluent/syncfiles.py
+++ b/confluent_server/confluent/syncfiles.py
@@ -142,8 +142,12 @@ def sync_list_to_node(sl, node, suffixes):
                 stage_ent(sl.appendoncemap, ent,
                           os.path.join(targdir, suffixes['appendonce']), True)
         sshutil.prep_ssh_key('/etc/confluent/ssh/automation')
-        output = subprocess.check_output(
-            ['rsync', '-rvLD', targdir + '/', 'root@{}:/'.format(node)], timeout=86400)
+        try:
+            output = subprocess.check_output(
+                ['rsync', '-rvLD', targdir + '/', 'root@{}:/'.format(node)], timeout=86400)
+        except TypeError:
+            output = subprocess.check_output(
+                ['rsync', '-rvLD', targdir + '/', 'root@{}:/'.format(node)])
     except Exception as e:
         if 'CalledProcessError' not in repr(e):
             # https://github.com/eventlet/eventlet/issues/413