diff --git a/lib/bundler/gem_helper.rb b/lib/bundler/gem_helper.rb
index e9ee03b8a2b..c923a0ad379 100644
--- a/lib/bundler/gem_helper.rb
+++ b/lib/bundler/gem_helper.rb
@@ -106,7 +106,7 @@ def rubygem_push(path)
       unless allowed_push_host || Bundler.user_home.join(".gem/credentials").file?
         raise "Your rubygems.org credentials aren't set. Run `gem push` to set them."
       end
-      sh(gem_command)
+      sh_with_input(gem_command)
       Bundler.ui.confirm "Pushed #{name} #{version} to #{gem_push_host}"
     end
 
@@ -180,6 +180,13 @@ def name
       gemspec.name
     end
 
+    def sh_with_input(cmd)
+      Bundler.ui.debug(cmd)
+      SharedHelpers.chdir(base) do
+        abort unless Kernel.system(*cmd)
+      end
+    end
+
     def sh(cmd, &block)
       out, status = sh_with_status(cmd, &block)
       unless status.success?
diff --git a/spec/bundler/gem_helper_spec.rb b/spec/bundler/gem_helper_spec.rb
index dc982c6ee78..4fa4831c59e 100644
--- a/spec/bundler/gem_helper_spec.rb
+++ b/spec/bundler/gem_helper_spec.rb
@@ -11,6 +11,7 @@
   before(:each) do
     global_config "BUNDLE_GEM__MIT" => "false", "BUNDLE_GEM__TEST" => "false", "BUNDLE_GEM__COC" => "false"
     bundle "gem #{app_name}"
+    prepare_gemspec(app_gemspec_path)
   end
 
   context "determining gemspec" do
@@ -218,15 +219,26 @@ def mock_build_message(name, version)
           end
         end
 
-        it "on releasing" do
-          mock_build_message app_name, app_version
-          mock_confirm_message "Tagged v#{app_version}."
-          mock_confirm_message "Pushed git commits and tags."
-          expect(subject).to receive(:rubygem_push).with(app_gem_path.to_s)
+        context "on releasing" do
+          before do
+            mock_build_message app_name, app_version
+            mock_confirm_message "Tagged v#{app_version}."
+            mock_confirm_message "Pushed git commits and tags."
 
-          Dir.chdir(app_path) { sys_exec("git push -u origin master") }
+            Dir.chdir(app_path) { sys_exec("git push -u origin master") }
+          end
 
-          Rake.application["release"].invoke
+          it "calls rubygem_push with proper arguments" do
+            expect(subject).to receive(:rubygem_push).with(app_gem_path.to_s)
+
+            Rake.application["release"].invoke
+          end
+
+          it "uses Kernel.system" do
+            expect(Kernel).to receive(:system).with("gem", "push", app_gem_path.to_s, "--host", "http://example.org").and_return(true)
+
+            Rake.application["release"].invoke
+          end
         end
 
         it "even if tag already exists" do
@@ -249,7 +261,7 @@ def mock_build_message(name, version)
       before(:each) do
         Rake.application = Rake::Application.new
         subject.install
-        allow(subject).to receive(:sh)
+        allow(subject).to receive(:sh_with_input)
       end
 
       after(:each) do
diff --git a/spec/commands/newgem_spec.rb b/spec/commands/newgem_spec.rb
index 2914ba66c52..fada9c8bfce 100644
--- a/spec/commands/newgem_spec.rb
+++ b/spec/commands/newgem_spec.rb
@@ -182,19 +182,7 @@ def gem_skeleton_assertions(gem_name)
     in_app_root
     bundle! "gem newgem --bin"
 
-    process_file(bundled_app("newgem", "newgem.gemspec")) do |line|
-      # Simulate replacing TODOs with real values
-      case line
-      when /spec\.metadata\["(?:allowed_push_host|homepage_uri|source_code_uri|changelog_uri)"\]/, /spec\.homepage/
-        line.gsub(/\=.*$/, "= 'http://example.org'")
-      when /spec\.summary/
-        line.gsub(/\=.*$/, "= %q{A short summary of my new gem.}")
-      when /spec\.description/
-        line.gsub(/\=.*$/, "= %q{A longer description of my new gem.}")
-      else
-        line
-      end
-    end
+    prepare_gemspec(bundled_app("newgem", "newgem.gemspec"))
 
     Dir.chdir(bundled_app("newgem")) do
       gems = ["rake-10.0.2", :bundler]
diff --git a/spec/support/helpers.rb b/spec/support/helpers.rb
index 8af2b1ff2db..1e6b70b4714 100644
--- a/spec/support/helpers.rb
+++ b/spec/support/helpers.rb
@@ -543,6 +543,22 @@ def with_read_only(pattern)
       Dir[pattern].each(&chmod[0o755, 0o644])
     end
 
+    # Simulate replacing TODOs with real values
+    def prepare_gemspec(pathname)
+      process_file(pathname) do |line|
+        case line
+        when /spec\.metadata\["(?:allowed_push_host|homepage_uri|source_code_uri|changelog_uri)"\]/, /spec\.homepage/
+          line.gsub(/\=.*$/, "= 'http://example.org'")
+        when /spec\.summary/
+          line.gsub(/\=.*$/, "= %q{A short summary of my new gem.}")
+        when /spec\.description/
+          line.gsub(/\=.*$/, "= %q{A longer description of my new gem.}")
+        else
+          line
+        end
+      end
+    end
+
     def process_file(pathname)
       changed_lines = pathname.readlines.map do |line|
         yield line