diff --git a/django/contrib/gis/gdal/datasource.py b/django/contrib/gis/gdal/datasource.py
index 53a185841b..0d7f78a735 100644
--- a/django/contrib/gis/gdal/datasource.py
+++ b/django/contrib/gis/gdal/datasource.py
@@ -86,7 +86,7 @@ class DataSource(GDALBase):
         else:
             raise OGRException('Invalid data source input type: %s' % type(ds_input))
 
-        if bool(ds):
+        if ds:
             self.ptr = ds
             self.driver = Driver(ds_driver)
         else:
diff --git a/django/contrib/gis/gdal/geometries.py b/django/contrib/gis/gdal/geometries.py
index 139cebefac..f9b94ea7fd 100644
--- a/django/contrib/gis/gdal/geometries.py
+++ b/django/contrib/gis/gdal/geometries.py
@@ -122,7 +122,7 @@ class OGRGeometry(GDALBase):
         self.ptr = g
 
         # Assigning the SpatialReference object to the geometry, if valid.
-        if bool(srs):
+        if srs:
             self.srs = srs
 
         # Setting the class depending upon the OGR Geometry Type
diff --git a/django/contrib/gis/gdal/prototypes/errcheck.py b/django/contrib/gis/gdal/prototypes/errcheck.py
index 3006107e45..1dbd924ab5 100644
--- a/django/contrib/gis/gdal/prototypes/errcheck.py
+++ b/django/contrib/gis/gdal/prototypes/errcheck.py
@@ -111,7 +111,7 @@ def check_pointer(result, func, cargs):
     "Makes sure the result pointer is valid."
     if isinstance(result, six.integer_types):
         result = c_void_p(result)
-    if bool(result):
+    if result:
         return result
     else:
         raise OGRException('Invalid pointer returned from "%s"' % func.__name__)
diff --git a/django/contrib/gis/geoip/prototypes.py b/django/contrib/gis/geoip/prototypes.py
index b6d5fe9c50..6d55a1041b 100644
--- a/django/contrib/gis/geoip/prototypes.py
+++ b/django/contrib/gis/geoip/prototypes.py
@@ -50,7 +50,7 @@ GeoIPRecord_delete.restype = None
 
 # For retrieving records by name or address.
 def check_record(result, func, cargs):
-    if bool(result):
+    if result:
         # Checking the pointer to the C structure, if valid pull out elements
         # into a dicionary.
         rec = result.contents
diff --git a/django/contrib/gis/geos/geometry.py b/django/contrib/gis/geos/geometry.py
index 2b31b08d38..7965fffa79 100644
--- a/django/contrib/gis/geos/geometry.py
+++ b/django/contrib/gis/geos/geometry.py
@@ -89,7 +89,7 @@ class GEOSGeometry(GEOSBase, ListMixin):
             # Invalid geometry type.
             raise TypeError('Improper geometry input type: %s' % str(type(geo_input)))
 
-        if bool(g):
+        if g:
             # Setting the pointer object with a valid pointer.
             self.ptr = g
         else:
diff --git a/django/contrib/gis/geos/prototypes/io.py b/django/contrib/gis/geos/prototypes/io.py
index ecc0e42e21..c7233f79fc 100644
--- a/django/contrib/gis/geos/prototypes/io.py
+++ b/django/contrib/gis/geos/prototypes/io.py
@@ -224,7 +224,7 @@ class WKBWriter(IOBase):
         return bool(ord(wkb_writer_get_include_srid(self.ptr)))
 
     def _set_include_srid(self, include):
-        if bool(include):
+        if include:
             flag = b'\x01'
         else:
             flag = b'\x00'
diff --git a/django/db/backends/mysql/introspection.py b/django/db/backends/mysql/introspection.py
index 6e3b8d4ea0..14aea3b475 100644
--- a/django/db/backends/mysql/introspection.py
+++ b/django/db/backends/mysql/introspection.py
@@ -120,7 +120,7 @@ class DatabaseIntrospection(BaseDatabaseIntrospection):
             # It's possible to have the unique and PK constraints in separate indexes.
             if row[2] == 'PRIMARY':
                 indexes[row[4]]['primary_key'] = True
-            if not bool(row[1]):
+            if not row[1]:
                 indexes[row[4]]['unique'] = True
         return indexes