diff --git a/requests/sessions.py b/requests/sessions.py
index 1c2a103600..cb3bc126f5 100644
--- a/requests/sessions.py
+++ b/requests/sessions.py
@@ -289,10 +289,7 @@ def rebuild_proxies(self, prepared_request, proxies):
         new_proxies = proxies.copy()
         no_proxy = proxies.get('no_proxy')
 
-        bypass_proxy = False
-        if self.trust_env:
-            bypass_proxy = should_bypass_proxies(url, no_proxy=no_proxy)
-        if self.trust_env and not bypass_proxy:
+        if self.trust_env and not should_bypass_proxies(url, no_proxy=no_proxy):
             environ_proxies = get_environ_proxies(url, no_proxy=no_proxy)
 
             proxy = environ_proxies.get(scheme, environ_proxies.get('all'))