diff --git a/lib/bundler/cli/cache.rb b/lib/bundler/cli/cache.rb
index 9cd6133879..c8698ed7e3 100644
--- a/lib/bundler/cli/cache.rb
+++ b/lib/bundler/cli/cache.rb
@@ -9,7 +9,7 @@ module Bundler
     end
 
     def run
-      Bundler.ui.level = "error" if options[:quiet]
+      Bundler.ui.level = "warn" if options[:quiet]
       Bundler.settings.set_command_option_if_given :path, options[:path]
       Bundler.settings.set_command_option_if_given :cache_path, options["cache-path"]
 
diff --git a/lib/bundler/cli/doctor.rb b/lib/bundler/cli/doctor.rb
index 959b1b5e04..c28997bc7d 100644
--- a/lib/bundler/cli/doctor.rb
+++ b/lib/bundler/cli/doctor.rb
@@ -61,7 +61,7 @@ module Bundler
     end
 
     def run
-      Bundler.ui.level = "error" if options[:quiet]
+      Bundler.ui.level = "warn" if options[:quiet]
       Bundler.settings.validate!
       check!
 
diff --git a/lib/bundler/cli/install.rb b/lib/bundler/cli/install.rb
index 5e39e2a36d..c86d8d31e3 100644
--- a/lib/bundler/cli/install.rb
+++ b/lib/bundler/cli/install.rb
@@ -8,7 +8,7 @@ module Bundler
     end
 
     def run
-      Bundler.ui.level = "error" if options[:quiet]
+      Bundler.ui.level = "warn" if options[:quiet]
 
       warn_if_root
 
diff --git a/lib/bundler/cli/update.rb b/lib/bundler/cli/update.rb
index cf6a5b26d3..1adcaef67c 100644
--- a/lib/bundler/cli/update.rb
+++ b/lib/bundler/cli/update.rb
@@ -9,7 +9,7 @@ module Bundler
     end
 
     def run
-      Bundler.ui.level = "error" if options[:quiet]
+      Bundler.ui.level = "warn" if options[:quiet]
 
       Plugin.gemfile_install(Bundler.default_gemfile) if Bundler.feature_flag.plugins?
 
diff --git a/spec/bundler/commands/install_spec.rb b/spec/bundler/commands/install_spec.rb
index 478ee9c38a..789fd9b5c0 100644
--- a/spec/bundler/commands/install_spec.rb
+++ b/spec/bundler/commands/install_spec.rb
@@ -585,7 +585,20 @@ RSpec.describe "bundle install with gem sources" do
   end
 
   describe "when requesting a quiet install via --quiet" do
-    it "should be quiet" do
+    it "should be quiet if there are no warnings" do
+      bundle "config set force_ruby_platform true"
+
+      gemfile <<-G
+        source "#{file_uri_for(gem_repo1)}"
+        gem 'rack'
+      G
+
+      bundle :install, :quiet => true
+      expect(out).to be_empty
+      expect(err).to be_empty
+    end
+
+    it "should still display warnings and errors" do
       bundle "config set force_ruby_platform true"
 
       create_file("install_with_warning.rb", <<~RUBY)
@@ -611,8 +624,9 @@ RSpec.describe "bundle install with gem sources" do
       G
 
       bundle :install, :quiet => true, :raise_on_error => false, :env => { "RUBYOPT" => "-r#{bundled_app("install_with_warning.rb")}" }
+      expect(out).to be_empty
       expect(err).to include("Could not find gem 'non-existing-gem'")
-      expect(err).not_to include("BOOOOO")
+      expect(err).to include("BOOOOO")
     end
   end