diff --git a/python/ola/StringUtils.py b/python/ola/StringUtils.py
index a0f51cfaf..4a4d7dd7d 100644
--- a/python/ola/StringUtils.py
+++ b/python/ola/StringUtils.py
@@ -32,11 +32,11 @@ def StringEscape(s):
   """Escape unprintable characters in a string."""
   # TODO(Peter): How does this interact with the E1.20 Unicode flag?
   # We don't use sys.version_info.major to support Python 2.6.
-  if sys.version_info[0] == 2 and type(s) == str:
+  if sys.version_info[0] == 2 and isinstance(s, str):
     return s.encode('string-escape')
-  elif sys.version_info[0] == 2 and type(s) == unicode:
+  elif sys.version_info[0] == 2 and isinstance(s, unicode):
     return s.encode('unicode-escape')
-  elif type(s) == str:
+  elif isinstance(s, str):
     # All strings in Python 3 are unicode
     # This encode/decode pair gets us an escaped string
     return s.encode('unicode-escape').decode(encoding="ascii",
diff --git a/tools/rdm/ResponderTest.py b/tools/rdm/ResponderTest.py
index 93490306f..23a6f532d 100644
--- a/tools/rdm/ResponderTest.py
+++ b/tools/rdm/ResponderTest.py
@@ -612,15 +612,15 @@ def _CheckForAckOrNack(self, response, unpacked_data, unpack_exception):
     return True
 
   def _EscapeData(self, data):
-    if type(data) == list:
+    if isinstance(data, list):
       return [self._EscapeData(i) for i in data]
-    elif type(data) == dict:
+    elif isinstance(data, dict):
       d = {}
       for k, v in data.items():
         # We can't escape the key as then it may become a new key
         d[k] = self._EscapeData(v)
       return d
-    elif type(data) == str or type(data) == unicode:
+    elif isinstance(data, str) or isinstance(data, unicode):
       return StringEscape(data)
     else:
       return data
diff --git a/tools/rdm/TestHelpers.py b/tools/rdm/TestHelpers.py
index 51eb606de..4a157bcf6 100644
--- a/tools/rdm/TestHelpers.py
+++ b/tools/rdm/TestHelpers.py
@@ -31,7 +31,7 @@
 def ContainsUnprintable(s):
   """Check if a string s contain unprintable characters."""
   # TODO(Peter): How does this interact with the E1.20 Unicode flag?
-  if type(s) == str or type(s) == unicode:
+  if isinstance(s, str) or isinstance(s, unicode):
     # All strings in Python 3 are unicode, Python 2 ones might not be
     return s != StringEscape(s)
   else: