diff --git a/Makefile b/Makefile
index 69a668e..413fc46 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 PYTHON ?= python
 
 inplace:
-	$(PYTHON) setup.py build_ext --inplace
+	$(PYTHON) setup.py build_ext --inplace --cython
 
 test: inplace
 	nosetests -s --with-doctest cytoolz/
diff --git a/cytoolz/tests/dev_skip_test.py b/cytoolz/tests/dev_skip_test.py
new file mode 100644
index 0000000..3546f8a
--- /dev/null
+++ b/cytoolz/tests/dev_skip_test.py
@@ -0,0 +1,8 @@
+import cytoolz
+from nose.tools import nottest, istest
+
+# Decorator used to skip tests for developmental versions of CyToolz
+if 'dev' in cytoolz.__version__:
+    dev_skip_test = nottest
+else:
+    dev_skip_test = istest
diff --git a/cytoolz/tests/test_curried_toolzlike.py b/cytoolz/tests/test_curried_toolzlike.py
index b45e3f7..333e229 100644
--- a/cytoolz/tests/test_curried_toolzlike.py
+++ b/cytoolz/tests/test_curried_toolzlike.py
@@ -3,16 +3,19 @@
 import toolz
 import toolz.curried
 import types
+from dev_skip_test import dev_skip_test
 
 
 # Note that the tests in this file assume `toolz.curry` is a class, but we
 # may some day make `toolz.curry` a function and `toolz.Curry` a class.
 
+@dev_skip_test
 def test_toolzcurry_is_class():
     assert isinstance(toolz.curry, type) is True
     assert isinstance(toolz.curry, types.FunctionType) is False
 
 
+@dev_skip_test
 def test_cytoolz_like_toolz():
     for key, val in toolz.curried.__dict__.items():
         if isinstance(val, toolz.curry):
@@ -22,6 +25,7 @@ def test_cytoolz_like_toolz():
                     'cytoolz.curried.%s should be curried' % key)
 
 
+@dev_skip_test
 def test_toolz_like_cytoolz():
     for key, val in cytoolz.curried.__dict__.items():
         if isinstance(val, cytoolz.curry):
diff --git a/cytoolz/tests/test_dev_skip_test.py b/cytoolz/tests/test_dev_skip_test.py
new file mode 100644
index 0000000..0c25271
--- /dev/null
+++ b/cytoolz/tests/test_dev_skip_test.py
@@ -0,0 +1,21 @@
+from dev_skip_test import istest, nottest, dev_skip_test
+
+d = {}
+
+
+@istest
+def test_passes():
+    d['istest'] = True
+    assert True
+
+
+@nottest
+def test_fails():
+    d['nottest'] = True
+    assert False
+
+
+def test_dev_skip_test():
+    assert dev_skip_test is istest or dev_skip_test is nottest
+    assert d.get('istest', False) is True
+    assert d.get('nottest', False) is False
diff --git a/cytoolz/tests/test_docstrings.py b/cytoolz/tests/test_docstrings.py
index 18cdd93..4be663c 100644
--- a/cytoolz/tests/test_docstrings.py
+++ b/cytoolz/tests/test_docstrings.py
@@ -4,6 +4,7 @@
 
 from cytoolz import curry, identity, keyfilter, valfilter, merge_with
 from cytoolz.utils import raises
+from dev_skip_test import dev_skip_test
 
 
 # `cytoolz` functions for which "# doctest: +SKIP" were added.
@@ -30,6 +31,7 @@ def convertdoc(doc):
     return doc
 
 
+@dev_skip_test
 def test_docstrings_uptodate():
     differ = difflib.Differ()
 
diff --git a/cytoolz/tests/test_embedded_sigs.py b/cytoolz/tests/test_embedded_sigs.py
index 07fbb1b..d2cd69f 100644
--- a/cytoolz/tests/test_embedded_sigs.py
+++ b/cytoolz/tests/test_embedded_sigs.py
@@ -4,6 +4,7 @@
 
 from types import BuiltinFunctionType
 from cytoolz import curry, identity, keyfilter, valfilter, merge_with
+from dev_skip_test import dev_skip_test
 
 
 @curry
@@ -12,6 +13,7 @@ def isfrommod(modname, func):
     return modname in mod
 
 
+@dev_skip_test
 def test_class_sigs():
     """ Test that all ``cdef class`` extension types in ``cytoolz`` have
         correctly embedded the function signature as done in ``toolz``.
@@ -54,6 +56,7 @@ def test_class_sigs():
 aliases = {'comp': 'compose'}
 
 
+@dev_skip_test
 def test_sig_at_beginning():
     """ Test that the function signature is at the beginning of the docstring
         and is followed by exactly one blank line.