diff --git a/tests/test_assets.py b/tests/test_assets.py
index cd69970a5e..280e993968 100644
--- a/tests/test_assets.py
+++ b/tests/test_assets.py
@@ -2108,7 +2108,7 @@ def test_write_version(self):
         self.assertIsNone(sa.select((version_table.c.version,)).scalar())
 
         # This should fail because the table has no version info and is,
-        # therefore, consdered v0
+        # therefore, considered v0
         with self.assertRaises(AssetDBVersionError):
             check_version_info(self.engine, version_table, -2)
 
diff --git a/zipline/data/minute_bars.py b/zipline/data/minute_bars.py
index db068323cc..1bc19f45bd 100644
--- a/zipline/data/minute_bars.py
+++ b/zipline/data/minute_bars.py
@@ -707,7 +707,7 @@ def write_sid(self, sid, df, invalid_data_behavior='warn'):
         Parameters
         ----------
         sid : int
-            The asset identifer for the data being written.
+            The asset identifier for the data being written.
         df : pd.DataFrame
             DataFrame of market data with the following characteristics.
             columns : ('open', 'high', 'low', 'close', 'volume')
diff --git a/zipline/errors.py b/zipline/errors.py
index bd96b0558f..c4849913d4 100644
--- a/zipline/errors.py
+++ b/zipline/errors.py
@@ -73,7 +73,7 @@ class WrongDataForTransform(ZiplineError):
 class UnsupportedSlippageModel(ZiplineError):
     """
     Raised if a user script calls the set_slippage magic
-    with a slipage object that isn't a VolumeShareSlippage or
+    with a slippage object that isn't a VolumeShareSlippage or
     FixedSlipapge
     """
     msg = """
diff --git a/zipline/finance/controls.py b/zipline/finance/controls.py
index 2dbebe997a..fda90ae817 100644
--- a/zipline/finance/controls.py
+++ b/zipline/finance/controls.py
@@ -62,7 +62,7 @@ def validate(self,
         restraint given the information in `portfolio`, this method should
         return None and have no externally-visible side-effects.
 
-        If the desired order violates this TradingControl's contraint, this
+        If the desired order violates this TradingControl's constraint, this
         method should call self.fail(asset, amount).
         """
         raise NotImplementedError
@@ -381,7 +381,7 @@ def validate(self,
         the information in `portfolio` and `account`, this method should
         return None and have no externally-visible side-effects.
 
-        If the desired order violates this AccountControl's contraint, this
+        If the desired order violates this AccountControl's constraint, this
         method should call self.fail().
         """
         raise NotImplementedError