4 files changed, 40 insertions, 3 deletions

diff --git a/lib/bundler/cli/outdated.rb b/lib/bundler/cli/outdated.rb
index ec42e631bb..64a83fd57e 100644
--- a/lib/bundler/cli/outdated.rb
+++ b/lib/bundler/cli/outdated.rb
@@ -54,7 +54,7 @@ module Bundler
       end
 
       if options[:parseable]
-        Bundler.ui.silence(&definition_resolution)
+        Bundler.ui.progress(&definition_resolution)
       else
         definition_resolution.call
       end
diff --git a/lib/bundler/ui/shell.rb b/lib/bundler/ui/shell.rb
index 32367a44f0..6df1512a5b 100644
--- a/lib/bundler/ui/shell.rb
+++ b/lib/bundler/ui/shell.rb
@@ -119,6 +119,10 @@ module Bundler
         with_level("silent", &blk)
       end
 
+      def progress(&blk)
+        with_output_stream(:stderr, &blk)
+      end
+
       def unprinted_warnings
         []
       end
@@ -170,6 +174,14 @@ module Bundler
       ensure
         @level = original
       end
+
+      def with_output_stream(symbol)
+        original = output_stream
+        self.output_stream = symbol
+        yield
+      ensure
+        @output_stream = original
+      end
     end
   end
 end
diff --git a/lib/bundler/ui/silent.rb b/lib/bundler/ui/silent.rb
index 9ca2a8b485..83d31d4b55 100644
--- a/lib/bundler/ui/silent.rb
+++ b/lib/bundler/ui/silent.rb
@@ -84,6 +84,10 @@ module Bundler
         yield
       end
 
+      def progress
+        yield
+      end
+
       def unprinted_warnings
         @warnings
       end
diff --git a/spec/bundler/commands/outdated_spec.rb b/spec/bundler/commands/outdated_spec.rb
index 55706df0d6..8bf3a468b4 100644
--- a/spec/bundler/commands/outdated_spec.rb
+++ b/spec/bundler/commands/outdated_spec.rb
@@ -438,19 +438,40 @@ RSpec.describe "bundle outdated" do
         G
       end
 
-      it "outputs a sorted list of outdated gems with a more minimal format" do
+      it "outputs a sorted list of outdated gems with a more minimal format to stdout" do
         minimal_output = "activesupport (newest 3.0, installed 2.3.5, requested = 2.3.5)\n" \
                          "weakling (newest 0.2, installed 0.0.3, requested ~> 0.0.1)"
         subject
         expect(out).to eq(minimal_output)
       end
+
+      it "outputs progress to stderr" do
+        subject
+        expect(err).to include("Fetching gem metadata")
+      end
     end
 
     context "and no gems are outdated" do
-      it "has empty output" do
+      before do
+        build_repo2 do
+          build_gem "activesupport", "3.0"
+        end
+
+        install_gemfile <<-G
+          source "https://gem.repo2"
+          gem "activesupport", "3.0"
+        G
+      end
+
+      it "does not output to stdout" do
         subject
         expect(out).to be_empty
       end
+
+      it "outputs progress to stderr" do
+        subject
+        expect(err).to include("Fetching gem metadata")
+      end
     end
   end