diff --git a/plugins/provisioners/chef/cap/freebsd/chef_installed.rb b/plugins/provisioners/chef/cap/freebsd/chef_installed.rb
index bb58083ca..9de19ef57 100644
--- a/plugins/provisioners/chef/cap/freebsd/chef_installed.rb
+++ b/plugins/provisioners/chef/cap/freebsd/chef_installed.rb
@@ -10,7 +10,7 @@ module VagrantPlugins
             command = "test -x #{knife}"
 
             if version != :latest
-              command << "&& #{knife} --version | grep 'Chef: #{version}'"
+              command << "&& #{knife} --version | grep '#{version}'"
             end
 
             machine.communicate.test(command, sudo: true)
diff --git a/plugins/provisioners/chef/cap/linux/chef_installed.rb b/plugins/provisioners/chef/cap/linux/chef_installed.rb
index c664f90bb..b5c8adff1 100644
--- a/plugins/provisioners/chef/cap/linux/chef_installed.rb
+++ b/plugins/provisioners/chef/cap/linux/chef_installed.rb
@@ -10,7 +10,7 @@ module VagrantPlugins
             command = "test -x #{knife}"
 
             if version != :latest
-              command << "&& #{knife} --version | grep 'Chef: #{version}'"
+              command << "&& #{knife} --version | grep '#{version}'"
             end
 
             machine.communicate.test(command, sudo: true)
diff --git a/plugins/provisioners/chef/cap/omnios/chef_installed.rb b/plugins/provisioners/chef/cap/omnios/chef_installed.rb
index c1e55ba53..b6a453d28 100644
--- a/plugins/provisioners/chef/cap/omnios/chef_installed.rb
+++ b/plugins/provisioners/chef/cap/omnios/chef_installed.rb
@@ -11,7 +11,7 @@ module VagrantPlugins
             command = "test -x #{knife}"
 
             if version != :latest
-              command << "&& #{knife} --version | grep 'Chef: #{version}'"
+              command << "&& #{knife} --version | grep '#{version}'"
             end
 
             machine.communicate.test(command, sudo: true)         
diff --git a/plugins/provisioners/chef/cap/windows/chef_installed.rb b/plugins/provisioners/chef/cap/windows/chef_installed.rb
index 61335a5cd..25a817607 100644
--- a/plugins/provisioners/chef/cap/windows/chef_installed.rb
+++ b/plugins/provisioners/chef/cap/windows/chef_installed.rb
@@ -7,9 +7,9 @@ module VagrantPlugins
           # @return [true, false]
           def self.chef_installed(machine, product, version)
             if version != :latest
-              command = 'if ((&knife --version) -Match "Chef: ' + version.to_s + '"){ exit 0 } else { exit 1 }'
+              command = 'if ((&knife --version) -Match "' + version.to_s + '"){ exit 0 } else { exit 1 }'
             else
-              command = 'if ((&knife --version) -Match "Chef: *"){ exit 0 } else { exit 1 }'
+              command = 'if ((&knife --version) -Match "Chef*"){ exit 0 } else { exit 1 }'
             end
             machine.communicate.test(command, sudo: true)
           end
diff --git a/test/unit/plugins/provisioners/chef/cap/freebsd/chef_installed_test.rb b/test/unit/plugins/provisioners/chef/cap/freebsd/chef_installed_test.rb
new file mode 100644
index 000000000..b0dc209c4
--- /dev/null
+++ b/test/unit/plugins/provisioners/chef/cap/freebsd/chef_installed_test.rb
@@ -0,0 +1,41 @@
+require_relative "../../../../../base"
+
+require Vagrant.source_root.join("plugins/provisioners/chef/cap/freebsd/chef_installed")
+
+describe VagrantPlugins::Chef::Cap::FreeBSD::ChefInstalled do
+  include_context "unit"
+
+  let(:iso_env) do
+    # We have to create a Vagrantfile so there is a root path
+    env = isolated_environment
+    env.vagrantfile("")
+    env.create_vagrant_env
+  end
+
+  let(:machine) { iso_env.machine(iso_env.machine_names[0], :dummy) }
+  let(:communicator) { VagrantTests::DummyCommunicator::Communicator.new(machine) }
+  let(:config)  { double("config") }
+
+  subject { described_class }
+
+  before do
+    allow(machine).to receive(:communicate).and_return(communicator)
+  end
+
+  describe "#chef_installed" do
+    let(:version) { "15.0.0" }
+    let(:command) { "test -x /opt/chef_solo/bin/knife&& /opt/chef_solo/bin/knife --version | grep '15.0.0'" }
+
+    it "returns true if installed" do
+      expect(machine.communicate).to receive(:test).
+        with(command, sudo: true).and_return(true)
+      subject.chef_installed(machine, "chef_solo", version)
+    end
+
+    it "returns false if not installed" do
+      expect(machine.communicate).to receive(:test).
+        with(command, sudo: true).and_return(false)
+      expect(subject.chef_installed(machine, "chef_solo", version)).to be_falsey
+    end
+  end
+end
diff --git a/test/unit/plugins/provisioners/chef/cap/linux/chef_installed_test.rb b/test/unit/plugins/provisioners/chef/cap/linux/chef_installed_test.rb
new file mode 100644
index 000000000..4b449fce1
--- /dev/null
+++ b/test/unit/plugins/provisioners/chef/cap/linux/chef_installed_test.rb
@@ -0,0 +1,41 @@
+require_relative "../../../../../base"
+
+require Vagrant.source_root.join("plugins/provisioners/chef/cap/linux/chef_installed")
+
+describe VagrantPlugins::Chef::Cap::Linux::ChefInstalled do
+  include_context "unit"
+
+  let(:iso_env) do
+    # We have to create a Vagrantfile so there is a root path
+    env = isolated_environment
+    env.vagrantfile("")
+    env.create_vagrant_env
+  end
+
+  let(:machine) { iso_env.machine(iso_env.machine_names[0], :dummy) }
+  let(:communicator) { VagrantTests::DummyCommunicator::Communicator.new(machine) }
+  let(:config)  { double("config") }
+
+  subject { described_class }
+
+  before do
+    allow(machine).to receive(:communicate).and_return(communicator)
+  end
+
+  describe "#chef_installed" do
+    let(:version) { "15.0.0" }
+    let(:command) { "test -x /opt/chef_solo/bin/knife&& /opt/chef_solo/bin/knife --version | grep '15.0.0'" }
+
+    it "returns true if installed" do
+      expect(machine.communicate).to receive(:test).
+        with(command, sudo: true).and_return(true)
+      subject.chef_installed(machine, "chef_solo", version)
+    end
+
+    it "returns false if not installed" do
+      expect(machine.communicate).to receive(:test).
+        with(command, sudo: true).and_return(false)
+      expect(subject.chef_installed(machine, "chef_solo", version)).to be_falsey
+    end
+  end
+end
diff --git a/test/unit/plugins/provisioners/chef/cap/omnios/chef_installed_test.rb b/test/unit/plugins/provisioners/chef/cap/omnios/chef_installed_test.rb
new file mode 100644
index 000000000..3c00f870a
--- /dev/null
+++ b/test/unit/plugins/provisioners/chef/cap/omnios/chef_installed_test.rb
@@ -0,0 +1,41 @@
+require_relative "../../../../../base"
+
+require Vagrant.source_root.join("plugins/provisioners/chef/cap/omnios/chef_installed")
+
+describe VagrantPlugins::Chef::Cap::OmniOS::ChefInstalled do
+  include_context "unit"
+
+  let(:iso_env) do
+    # We have to create a Vagrantfile so there is a root path
+    env = isolated_environment
+    env.vagrantfile("")
+    env.create_vagrant_env
+  end
+
+  let(:machine) { iso_env.machine(iso_env.machine_names[0], :dummy) }
+  let(:communicator) { VagrantTests::DummyCommunicator::Communicator.new(machine) }
+  let(:config)  { double("config") }
+
+  subject { described_class }
+
+  before do
+    allow(machine).to receive(:communicate).and_return(communicator)
+  end
+
+  describe "#chef_installed" do
+    let(:version) { "15.0.0" }
+    let(:command) { "test -x /opt/chef_solo/bin/knife&& /opt/chef_solo/bin/knife --version | grep '15.0.0'" }
+
+    it "returns true if installed" do
+      expect(machine.communicate).to receive(:test).
+        with(command, sudo: true).and_return(true)
+      subject.chef_installed(machine, "chef_solo", version)
+    end
+
+    it "returns false if not installed" do
+      expect(machine.communicate).to receive(:test).
+        with(command, sudo: true).and_return(false)
+      expect(subject.chef_installed(machine, "chef_solo", version)).to be_falsey
+    end
+  end
+end
diff --git a/test/unit/plugins/provisioners/chef/cap/windows/chef_installed_test.rb b/test/unit/plugins/provisioners/chef/cap/windows/chef_installed_test.rb
new file mode 100644
index 000000000..3a487933f
--- /dev/null
+++ b/test/unit/plugins/provisioners/chef/cap/windows/chef_installed_test.rb
@@ -0,0 +1,41 @@
+require_relative "../../../../../base"
+
+require Vagrant.source_root.join("plugins/provisioners/chef/cap/windows/chef_installed")
+
+describe VagrantPlugins::Chef::Cap::Windows::ChefInstalled do
+  include_context "unit"
+
+  let(:iso_env) do
+    # We have to create a Vagrantfile so there is a root path
+    env = isolated_environment
+    env.vagrantfile("")
+    env.create_vagrant_env
+  end
+
+  let(:machine) { iso_env.machine(iso_env.machine_names[0], :dummy) }
+  let(:communicator) { VagrantTests::DummyCommunicator::Communicator.new(machine) }
+  let(:config)  { double("config") }
+
+  subject { described_class }
+
+  before do
+    allow(machine).to receive(:communicate).and_return(communicator)
+  end
+
+  describe "#chef_installed" do
+    let(:version) { "15.0.0" }
+    let(:command) { "if ((&knife --version) -Match \"15.0.0\"){ exit 0 } else { exit 1 }" }
+
+    it "returns true if installed" do
+      expect(machine.communicate).to receive(:test).
+        with(command, sudo: true).and_return(true)
+      subject.chef_installed(machine, "chef_solo", version)
+    end
+
+    it "returns false if not installed" do
+      expect(machine.communicate).to receive(:test).
+        with(command, sudo: true).and_return(false)
+      expect(subject.chef_installed(machine, "chef_solo", version)).to be_falsey
+    end
+  end
+end