diff --git a/scrapy/extensions/feedexport.py b/scrapy/extensions/feedexport.py
index 4f0a946de..83849ca13 100644
--- a/scrapy/extensions/feedexport.py
+++ b/scrapy/extensions/feedexport.py
@@ -21,7 +21,7 @@ from zope.interface import Interface, implementer
 from scrapy import Spider, signals
 from scrapy.exceptions import NotConfigured, ScrapyDeprecationWarning
 from scrapy.extensions.postprocessing import PostProcessingManager
-from scrapy.utils.boto import is_boto3_available, is_botocore_available
+from scrapy.utils.boto import is_botocore_available
 from scrapy.utils.conf import feed_complete_default_values_from_settings
 from scrapy.utils.ftp import ftp_store_file
 from scrapy.utils.log import failure_to_exc_info
@@ -30,6 +30,13 @@ from scrapy.utils.python import get_func_args, without_none_values
 
 logger = logging.getLogger(__name__)
 
+try:
+    import boto3  # noqa: F401
+
+    IS_BOTO3_AVAILABLE = True
+except ImportError:
+    IS_BOTO3_AVAILABLE = False
+
 
 def build_storage(builder, uri, *args, feed_options=None, preargs=(), **kwargs):
     argument_names = get_func_args(builder)
@@ -173,9 +180,8 @@ class S3FeedStorage(BlockingFeedStorage):
         self.keyname = u.path[1:]  # remove first "/"
         self.acl = acl
         self.endpoint_url = endpoint_url
-        self._using_boto3 = is_boto3_available()
 
-        if self._using_boto3:
+        if IS_BOTO3_AVAILABLE:
             import boto3.session
 
             session = boto3.session.Session()
@@ -228,7 +234,7 @@ class S3FeedStorage(BlockingFeedStorage):
 
     def _store_in_thread(self, file):
         file.seek(0)
-        if self._using_boto3:
+        if IS_BOTO3_AVAILABLE:
             kwargs = {"ExtraArgs": {"ACL": self.acl}} if self.acl else {}
             self.s3_client.upload_fileobj(
                 Bucket=self.bucketname, Key=self.keyname, Fileobj=file, **kwargs
diff --git a/scrapy/utils/boto.py b/scrapy/utils/boto.py
index 7b18b6bcf..085ee7d25 100644
--- a/scrapy/utils/boto.py
+++ b/scrapy/utils/boto.py
@@ -8,12 +8,3 @@ def is_botocore_available():
         return True
     except ImportError:
         return False
-
-
-def is_boto3_available():
-    try:
-        import boto3  # noqa: F401
-
-        return True
-    except ImportError:
-        return False
diff --git a/tests/test_feedexport.py b/tests/test_feedexport.py
index 2e350df65..7df3e6dd3 100644
--- a/tests/test_feedexport.py
+++ b/tests/test_feedexport.py
@@ -35,6 +35,7 @@ import scrapy
 from scrapy.exceptions import NotConfigured, ScrapyDeprecationWarning
 from scrapy.exporters import CsvItemExporter, JsonItemExporter
 from scrapy.extensions.feedexport import (
+    IS_BOTO3_AVAILABLE,
     BlockingFeedStorage,
     FeedExporter,
     FileFeedStorage,
@@ -44,7 +45,6 @@ from scrapy.extensions.feedexport import (
     S3FeedStorage,
     StdoutFeedStorage,
     _FeedSlot,
-    is_boto3_available,
 )
 from scrapy.settings import Settings
 from scrapy.utils.python import to_unicode
@@ -287,7 +287,7 @@ class S3FeedStorageTest(unittest.TestCase):
 
         file = mock.MagicMock()
 
-        if is_boto3_available():
+        if IS_BOTO3_AVAILABLE:
             storage.s3_client = mock.MagicMock()
             yield storage.store(file)
             self.assertEqual(
@@ -413,7 +413,7 @@ class S3FeedStorageTest(unittest.TestCase):
 
         storage.s3_client = mock.MagicMock()
         yield storage.store(BytesIO(b"test file"))
-        if is_boto3_available():
+        if IS_BOTO3_AVAILABLE:
             acl = (
                 storage.s3_client.upload_fileobj.call_args[1]
                 .get("ExtraArgs", {})
@@ -434,7 +434,7 @@ class S3FeedStorageTest(unittest.TestCase):
 
         storage.s3_client = mock.MagicMock()
         yield storage.store(BytesIO(b"test file"))
-        if is_boto3_available():
+        if IS_BOTO3_AVAILABLE:
             acl = storage.s3_client.upload_fileobj.call_args[1]["ExtraArgs"]["ACL"]
         else:
             acl = storage.s3_client.put_object.call_args[1]["ACL"]