diff --git a/lib/bundler/installer.rb b/lib/bundler/installer.rb
index 7c13c0c8a93..3212a682114 100644
--- a/lib/bundler/installer.rb
+++ b/lib/bundler/installer.rb
@@ -165,7 +165,7 @@ def install(options)
       load_plugins
       force = options["force"]
       jobs = 1
-      jobs = [Bundler.settings[:jobs].to_i - 1, 1].max if can_install_in_parallel?
+      jobs = [Bundler.settings[:jobs].to_i, 1].max if can_install_in_parallel?
       install_in_parallel jobs, options[:standalone], force
     end
 
diff --git a/lib/bundler/installer/parallel_installer.rb b/lib/bundler/installer/parallel_installer.rb
index 97c124e0150..306a1bdc15b 100644
--- a/lib/bundler/installer/parallel_installer.rb
+++ b/lib/bundler/installer/parallel_installer.rb
@@ -79,7 +79,7 @@ def self.call(*args)
 
     # Returns max number of threads machine can handle with a min of 1
     def self.max_threads
-      [Bundler.settings[:jobs].to_i - 1, 1].max
+      [Bundler.settings[:jobs].to_i, 1].max
     end
 
     attr_reader :size
diff --git a/spec/realworld/parallel_spec.rb b/spec/realworld/parallel_spec.rb
index b8233206e87..a3b29bf6081 100644
--- a/spec/realworld/parallel_spec.rb
+++ b/spec/realworld/parallel_spec.rb
@@ -9,10 +9,11 @@
       gem 'i18n', '~> 0.6.0' # Because 0.7+ requires Ruby 1.9.3+
     G
 
-    bundle :install, :jobs => 4, :env => { "DEBUG" => "1" }
+    bundle :install, :jobs => 2, :env => { "DEBUG" => "1" }
 
     if Bundler.rubygems.provides?(">= 2.1.0")
-      expect(out).to match(/[1-3]: /)
+      expect(out).to match(/^0: /)
+      expect(out).to match(/^1: /)
     else
       expect(out).to include("is not threadsafe")
     end
@@ -24,7 +25,7 @@
     expect(out).to match(/faker/)
 
     bundle "config jobs"
-    expect(out).to match(/: "4"/)
+    expect(out).to match(/: "2"/)
   end
 
   it "updates" do
@@ -41,10 +42,11 @@
       gem 'i18n', '~> 0.6.0' # Because 0.7+ requires Ruby 1.9.3+
     G
 
-    bundle :update, :jobs => 4, :env => { "DEBUG" => "1" }
+    bundle :update, :jobs => 2, :env => { "DEBUG" => "1" }
 
     if Bundler.rubygems.provides?(">= 2.1.0")
-      expect(out).to match(/[1-3]: /)
+      expect(out).to match(/^0: /)
+      expect(out).to match(/^1: /)
     else
       expect(out).to include("is not threadsafe")
     end
@@ -56,7 +58,7 @@
     expect(out).to match(/faker/)
 
     bundle "config jobs"
-    expect(out).to match(/: "4"/)
+    expect(out).to match(/: "2"/)
   end
 
   it "works with --standalone" do