diff --git a/tests/bug639/models.py b/tests/bug639/models.py
index 3b6a007f6b..db34532025 100644
--- a/tests/bug639/models.py
+++ b/tests/bug639/models.py
@@ -1,3 +1,4 @@
+import os
 import tempfile
 
 from django.core.files.storage import FileSystemStorage
@@ -5,7 +6,7 @@ from django.db import models
 from django.forms import ModelForm
 
 
-temp_storage_dir = tempfile.mkdtemp()
+temp_storage_dir = tempfile.mkdtemp(dir=os.environ['DJANGO_TEST_TEMP_DIR'])
 temp_storage = FileSystemStorage(temp_storage_dir)
 
 
diff --git a/tests/file_storage/models.py b/tests/file_storage/models.py
index 738a3a1772..1ce9a26956 100644
--- a/tests/file_storage/models.py
+++ b/tests/file_storage/models.py
@@ -5,6 +5,7 @@
 and where files should be stored.
 """
 
+import os
 import random
 import tempfile
 
@@ -12,7 +13,7 @@ from django.db import models
 from django.core.files.storage import FileSystemStorage
 
 
-temp_storage_location = tempfile.mkdtemp()
+temp_storage_location = tempfile.mkdtemp(dir=os.environ['DJANGO_TEST_TEMP_DIR'])
 temp_storage = FileSystemStorage(location=temp_storage_location)
 
 
diff --git a/tests/file_uploads/tests.py b/tests/file_uploads/tests.py
index c933d38236..a4b4386a62 100644
--- a/tests/file_uploads/tests.py
+++ b/tests/file_uploads/tests.py
@@ -23,7 +23,7 @@ from .models import FileModel
 
 
 UNICODE_FILENAME = 'test-0123456789_中文_Orléans.jpg'
-MEDIA_ROOT = sys_tempfile.mkdtemp()
+MEDIA_ROOT = sys_tempfile.mkdtemp(dir=os.environ['DJANGO_TEST_TEMP_DIR'])
 UPLOAD_TO = os.path.join(MEDIA_ROOT, 'test_upload')
 
 
diff --git a/tests/model_fields/models.py b/tests/model_fields/models.py
index a69811094f..3888223ad9 100644
--- a/tests/model_fields/models.py
+++ b/tests/model_fields/models.py
@@ -186,7 +186,7 @@ if Image:
         attr_class = TestImageFieldFile
 
     # Set up a temp directory for file storage.
-    temp_storage_dir = tempfile.mkdtemp()
+    temp_storage_dir = tempfile.mkdtemp(dir=os.environ['DJANGO_TEST_TEMP_DIR'])
     temp_storage = FileSystemStorage(temp_storage_dir)
     temp_upload_to_dir = os.path.join(temp_storage.location, 'tests')