diff --git a/.travis.yml b/.travis.yml
index c70b24b8..c6e2098f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,11 +7,16 @@ python:
     - "3.4"
     - "3.5"
     - "3.6"
+    - "3.7-dev"
     - "pypy"
 
 env:
     - PEP8_IGNORE="E731,W503,E402"
 
+matrix:
+  allow_failures:
+    - python: "3.7-dev"
+
 # command to install dependencies
 install:
     - pip install coverage pep8 pytest
diff --git a/toolz/functoolz.py b/toolz/functoolz.py
index 2bd80a4d..408d73f3 100644
--- a/toolz/functoolz.py
+++ b/toolz/functoolz.py
@@ -498,7 +498,7 @@ def composed_doc(*fs):
     def __name__(self):
         try:
             return '_of_'.join(
-                f.__name__ for f in reversed((self.first,) + self.funcs),
+                f.__name__ for f in reversed((self.first,) + self.funcs)
             )
         except AttributeError:
             return type(self).__name__
diff --git a/toolz/tests/test_inspect_args.py b/toolz/tests/test_inspect_args.py
index 3ae3693a..ef03331e 100644
--- a/toolz/tests/test_inspect_args.py
+++ b/toolz/tests/test_inspect_args.py
@@ -402,6 +402,7 @@ def add_blacklist(mod, attr):
             blacklist.add(getattr(mod, attr))
 
     add_blacklist(builtins, 'basestring')
+    add_blacklist(builtins, 'breakpoint')
     add_blacklist(builtins, 'NoneType')
     add_blacklist(builtins, '__metaclass__')
     add_blacklist(builtins, 'sequenceiterator')
@@ -497,4 +498,3 @@ def __wrapped__(self):
     assert num_required_args(Wrapped) == (False if PY33 else None)
     _sigs.signatures[Wrapped] = (_sigs.expand_sig((0, lambda func: None)),)
     assert num_required_args(Wrapped) == 1
-