diff --git a/tests/modeltests/files/tests.py b/tests/modeltests/files/tests.py
index daf22096057..71ca1032054 100644
--- a/tests/modeltests/files/tests.py
+++ b/tests/modeltests/files/tests.py
@@ -20,7 +20,7 @@ class FileStorageTests(TestCase):
         shutil.rmtree(temp_storage_location)
 
     def test_files(self):
-        temp_storage.save('tests/default.txt', ContentFile(b'default content'))
+        temp_storage.save('tests/default.txt', ContentFile('default content'))
         # Attempting to access a FileField from the class raises a descriptive
         # error
         self.assertRaises(AttributeError, lambda: Storage.normal)
@@ -31,7 +31,7 @@ class FileStorageTests(TestCase):
         self.assertRaises(ValueError, lambda: obj1.normal.size)
 
         # Saving a file enables full functionality.
-        obj1.normal.save("django_test.txt", ContentFile(b"content"))
+        obj1.normal.save("django_test.txt", ContentFile("content"))
         self.assertEqual(obj1.normal.name, "tests/django_test.txt")
         self.assertEqual(obj1.normal.size, 7)
         self.assertEqual(obj1.normal.read(), b"content")
@@ -59,7 +59,7 @@ class FileStorageTests(TestCase):
 
         # Save another file with the same name.
         obj2 = Storage()
-        obj2.normal.save("django_test.txt", ContentFile(b"more content"))
+        obj2.normal.save("django_test.txt", ContentFile("more content"))
         self.assertEqual(obj2.normal.name, "tests/django_test_1.txt")
         self.assertEqual(obj2.normal.size, 12)
 
@@ -70,13 +70,13 @@ class FileStorageTests(TestCase):
 
         # Deleting an object does not delete the file it uses.
         obj2.delete()
-        obj2.normal.save("django_test.txt", ContentFile(b"more content"))
+        obj2.normal.save("django_test.txt", ContentFile("more content"))
         self.assertEqual(obj2.normal.name, "tests/django_test_2.txt")
 
         # Multiple files with the same name get _N appended to them.
         objs = [Storage() for i in range(3)]
         for o in objs:
-            o.normal.save("multiple_files.txt", ContentFile(b"Same Content"))
+            o.normal.save("multiple_files.txt", ContentFile("Same Content"))
         self.assertEqual(
             [o.normal.name for o in objs],
             ["tests/multiple_files.txt", "tests/multiple_files_1.txt", "tests/multiple_files_2.txt"]
@@ -100,7 +100,7 @@ class FileStorageTests(TestCase):
         # Verify the fix for #5655, making sure the directory is only
         # determined once.
         obj4 = Storage()
-        obj4.random.save("random_file", ContentFile(b"random content"))
+        obj4.random.save("random_file", ContentFile("random content"))
         self.assertTrue(obj4.random.name.endswith("/random_file"))
 
     def test_max_length(self):
diff --git a/tests/regressiontests/file_storage/tests.py b/tests/regressiontests/file_storage/tests.py
index cdd490fe93a..396e70f5e6e 100644
--- a/tests/regressiontests/file_storage/tests.py
+++ b/tests/regressiontests/file_storage/tests.py
@@ -128,7 +128,7 @@ class FileStorageTests(unittest.TestCase):
         """
         self.assertFalse(self.storage.exists('test.file'))
 
-        f = ContentFile(b'custom contents')
+        f = ContentFile('custom contents')
         f_name = self.storage.save('test.file', f)
         atime = self.storage.accessed_time(f_name)
 
@@ -144,7 +144,7 @@ class FileStorageTests(unittest.TestCase):
         """
         self.assertFalse(self.storage.exists('test.file'))
 
-        f = ContentFile(b'custom contents')
+        f = ContentFile('custom contents')
         f_name = self.storage.save('test.file', f)
         ctime = self.storage.created_time(f_name)
 
@@ -161,7 +161,7 @@ class FileStorageTests(unittest.TestCase):
         """
         self.assertFalse(self.storage.exists('test.file'))
 
-        f = ContentFile(b'custom contents')
+        f = ContentFile('custom contents')
         f_name = self.storage.save('test.file', f)
         mtime = self.storage.modified_time(f_name)
 
@@ -178,7 +178,7 @@ class FileStorageTests(unittest.TestCase):
         """
         self.assertFalse(self.storage.exists('test.file'))
 
-        f = ContentFile(b'custom contents')
+        f = ContentFile('custom contents')
         f.name = 'test.file'
 
         storage_f_name = self.storage.save(None, f)
@@ -195,7 +195,7 @@ class FileStorageTests(unittest.TestCase):
         """
         self.assertFalse(self.storage.exists('path/to'))
         self.storage.save('path/to/test.file',
-            ContentFile(b'file saved with path'))
+            ContentFile('file saved with path'))
 
         self.assertTrue(self.storage.exists('path/to'))
         with self.storage.open('path/to/test.file') as f:
@@ -212,7 +212,7 @@ class FileStorageTests(unittest.TestCase):
         """
         self.assertFalse(self.storage.exists('test.file'))
 
-        f = ContentFile(b'custom contents')
+        f = ContentFile('custom contents')
         f_name = self.storage.save('test.file', f)
 
         self.assertEqual(self.storage.path(f_name),
@@ -247,8 +247,8 @@ class FileStorageTests(unittest.TestCase):
         self.assertFalse(self.storage.exists('storage_test_2'))
         self.assertFalse(self.storage.exists('storage_dir_1'))
 
-        f = self.storage.save('storage_test_1', ContentFile(b'custom content'))
-        f = self.storage.save('storage_test_2', ContentFile(b'custom content'))
+        f = self.storage.save('storage_test_1', ContentFile('custom content'))
+        f = self.storage.save('storage_test_2', ContentFile('custom content'))
         os.mkdir(os.path.join(self.temp_dir, 'storage_dir_1'))
 
         dirs, files = self.storage.listdir('')
@@ -305,18 +305,18 @@ class FileStorageTests(unittest.TestCase):
             os.makedirs = fake_makedirs
 
             self.storage.save('normal/test.file',
-                ContentFile(b'saved normally'))
+                ContentFile('saved normally'))
             with self.storage.open('normal/test.file') as f:
                 self.assertEqual(f.read(), b'saved normally')
 
             self.storage.save('raced/test.file',
-                ContentFile(b'saved with race'))
+                ContentFile('saved with race'))
             with self.storage.open('raced/test.file') as f:
                 self.assertEqual(f.read(), b'saved with race')
 
             # Check that OSErrors aside from EEXIST are still raised.
             self.assertRaises(OSError,
-                self.storage.save, 'error/test.file', ContentFile(b'not saved'))
+                self.storage.save, 'error/test.file', ContentFile('not saved'))
         finally:
             os.makedirs = real_makedirs
 
@@ -342,16 +342,16 @@ class FileStorageTests(unittest.TestCase):
         try:
             os.remove = fake_remove
 
-            self.storage.save('normal.file', ContentFile(b'delete normally'))
+            self.storage.save('normal.file', ContentFile('delete normally'))
             self.storage.delete('normal.file')
             self.assertFalse(self.storage.exists('normal.file'))
 
-            self.storage.save('raced.file', ContentFile(b'delete with race'))
+            self.storage.save('raced.file', ContentFile('delete with race'))
             self.storage.delete('raced.file')
             self.assertFalse(self.storage.exists('normal.file'))
 
             # Check that OSErrors aside from ENOENT are still raised.
-            self.storage.save('error.file', ContentFile(b'delete with error'))
+            self.storage.save('error.file', ContentFile('delete with error'))
             self.assertRaises(OSError, self.storage.delete, 'error.file')
         finally:
             os.remove = real_remove
@@ -375,9 +375,9 @@ class CustomStorageTests(FileStorageTests):
     storage_class = CustomStorage
 
     def test_custom_get_available_name(self):
-        first = self.storage.save('custom_storage', ContentFile(b'custom contents'))
+        first = self.storage.save('custom_storage', ContentFile('custom contents'))
         self.assertEqual(first, 'custom_storage')
-        second = self.storage.save('custom_storage', ContentFile(b'more contents'))
+        second = self.storage.save('custom_storage', ContentFile('more contents'))
         self.assertEqual(second, 'custom_storage.2')
         self.storage.delete(first)
         self.storage.delete(second)
@@ -434,7 +434,7 @@ class FileStoragePermissions(unittest.TestCase):
         shutil.rmtree(self.storage_dir)
 
     def test_file_upload_permissions(self):
-        name = self.storage.save("the_file", ContentFile(b"data"))
+        name = self.storage.save("the_file", ContentFile("data"))
         actual_mode = os.stat(self.storage.path(name))[0] & 0o777
         self.assertEqual(actual_mode, 0o666)
 
@@ -454,8 +454,8 @@ class FileStoragePathParsing(unittest.TestCase):
         sure we still mangle the file name instead of the directory name.
         """
 
-        self.storage.save('dotted.path/test', ContentFile(b"1"))
-        self.storage.save('dotted.path/test', ContentFile(b"2"))
+        self.storage.save('dotted.path/test', ContentFile("1"))
+        self.storage.save('dotted.path/test', ContentFile("2"))
 
         self.assertFalse(os.path.exists(os.path.join(self.storage_dir, 'dotted_.path')))
         self.assertTrue(os.path.exists(os.path.join(self.storage_dir, 'dotted.path/test')))
@@ -466,8 +466,8 @@ class FileStoragePathParsing(unittest.TestCase):
         File names with a dot as their first character don't have an extension,
         and the underscore should get added to the end.
         """
-        self.storage.save('dotted.path/.test', ContentFile(b"1"))
-        self.storage.save('dotted.path/.test', ContentFile(b"2"))
+        self.storage.save('dotted.path/.test', ContentFile("1"))
+        self.storage.save('dotted.path/.test', ContentFile("2"))
 
         self.assertTrue(os.path.exists(os.path.join(self.storage_dir, 'dotted.path/.test')))
         self.assertTrue(os.path.exists(os.path.join(self.storage_dir, 'dotted.path/.test_1')))