diff --git a/bundler/lib/bundler/fetcher/index.rb b/bundler/lib/bundler/fetcher/index.rb
index 363d3c0ac652..08b041897eb3 100644
--- a/bundler/lib/bundler/fetcher/index.rb
+++ b/bundler/lib/bundler/fetcher/index.rb
@@ -19,8 +19,7 @@ def specs(_gem_names)
           raise BadAuthenticationError, remote_uri if remote_uri.userinfo
           raise AuthenticationRequiredError, remote_uri
         else
-          Bundler.ui.trace e
-          raise HTTPError, "Could not fetch specs from #{display_uri}"
+          raise HTTPError, "Could not fetch specs from #{display_uri} due to underlying error <#{e.message}>"
         end
       end
 
diff --git a/bundler/spec/bundler/fetcher/index_spec.rb b/bundler/spec/bundler/fetcher/index_spec.rb
index dd695b53b7fa..b8ce46321e1b 100644
--- a/bundler/spec/bundler/fetcher/index_spec.rb
+++ b/bundler/spec/bundler/fetcher/index_spec.rb
@@ -90,7 +90,7 @@
       before { allow(Bundler).to receive(:ui).and_return(double(:trace => nil)) }
 
       it "should raise a Bundler::HTTPError" do
-        expect { subject.specs(gem_names) }.to raise_error(Bundler::HTTPError, "Could not fetch specs from http://sample_uri.com")
+        expect { subject.specs(gem_names) }.to raise_error(Bundler::HTTPError, "Could not fetch specs from http://sample_uri.com due to underlying error <You get an error, you get an error! (http://sample_uri.com)>")
       end
     end
   end