diff --git a/scrapy/pipelines/images.py b/scrapy/pipelines/images.py
index 964541d6a..af5825c0b 100644
--- a/scrapy/pipelines/images.py
+++ b/scrapy/pipelines/images.py
@@ -42,7 +42,7 @@ class ImagesPipeline(FilesPipeline):
     # ImagesPipeline. They may be overridden by settings.
     MIN_WIDTH = 0
     MIN_HEIGHT = 0
-    EXPIRES = 0
+    EXPIRES = 90
     THUMBS = {}
     DEFAULT_IMAGES_URLS_FIELD = 'image_urls'
     DEFAULT_IMAGES_RESULT_FIELD = 'images'
diff --git a/tests/test_pipeline_images.py b/tests/test_pipeline_images.py
index 6ccd9791e..8286582de 100644
--- a/tests/test_pipeline_images.py
+++ b/tests/test_pipeline_images.py
@@ -221,7 +221,7 @@ class ImagesPipelineTestCaseCustomSettings(unittest.TestCase):
     default_pipeline_settings = dict(
         MIN_WIDTH=0,
         MIN_HEIGHT=0,
-        EXPIRES=0,
+        EXPIRES=90,
         THUMBS={},
         IMAGES_URLS_FIELD='image_urls',
         IMAGES_RESULT_FIELD='images'