diff --git a/test/unit/vagrant/action/builtin/handle_forwarded_port_collisions_test.rb b/test/unit/vagrant/action/builtin/handle_forwarded_port_collisions_test.rb
index 3bc56d840..865c35248 100644
--- a/test/unit/vagrant/action/builtin/handle_forwarded_port_collisions_test.rb
+++ b/test/unit/vagrant/action/builtin/handle_forwarded_port_collisions_test.rb
@@ -75,8 +75,8 @@ describe Vagrant::Action::Builtin::HandleForwardedPortCollisions do
       end
 
       it "should check if host port is in use" do
-        expect(instance).to receive(:is_forwarded_already).and_return false
-        expect(instance).to receive(:is_port_open?).and_return false
+        expect(instance).to receive(:is_forwarded_already).and_return(false)
+        expect(instance).to receive(:is_port_open?).and_return(false)
         instance.call(env)
       end
 
@@ -149,7 +149,7 @@ describe Vagrant::Action::Builtin::HandleForwardedPortCollisions do
     let(:host_port){ 8080 }
 
     it "should check if the port is open" do
-      expect(instance).to receive(:is_port_open?).with(host_ip, host_port).and_return true
+      expect(instance).to receive(:is_port_open?).with(host_ip, host_port).and_return(true)
       instance.send(:port_check, host_ip, host_port)
     end
 
@@ -157,13 +157,13 @@ describe Vagrant::Action::Builtin::HandleForwardedPortCollisions do
       let(:host_ip){ nil }
 
       it "should set host_ip to 0.0.0.0 when unset" do
-        expect(instance).to receive(:is_port_open?).with("0.0.0.0", host_port).and_return true
+        expect(instance).to receive(:is_port_open?).with("0.0.0.0", host_port).and_return(true)
         instance.send(:port_check, host_ip, host_port)
       end
 
       it "should set host_ip to 127.0.0.1 when 0.0.0.0 is not available" do
-        expect(instance).to receive(:is_port_open?).with("0.0.0.0", host_port).and_raise Errno::EADDRNOTAVAIL
-        expect(instance).to receive(:is_port_open?).with("127.0.0.1", host_port).and_return true
+        expect(instance).to receive(:is_port_open?).with("0.0.0.0", host_port).and_raise(Errno::EADDRNOTAVAIL)
+        expect(instance).to receive(:is_port_open?).with("127.0.0.1", host_port).and_return(true)
         instance.send(:port_check, host_ip, host_port)
       end
     end
diff --git a/test/unit/vagrant/util/is_port_open_test.rb b/test/unit/vagrant/util/is_port_open_test.rb
index ff6109639..d931a8790 100644
--- a/test/unit/vagrant/util/is_port_open_test.rb
+++ b/test/unit/vagrant/util/is_port_open_test.rb
@@ -51,13 +51,13 @@ describe Vagrant::Util::IsPortOpen do
   end
 
   it "should handle connection refused" do
-    expect(TCPSocket).to receive(:new).with("0.0.0.0", closed_port).and_raise Errno::ECONNREFUSED
+    expect(TCPSocket).to receive(:new).with("0.0.0.0", closed_port).and_raise(Errno::ECONNREFUSED)
     expect(klass.is_port_open?("0.0.0.0", closed_port)).to be(false)
   end
 
   it "should raise an error if cannot assign requested address" do
-    expect(TCPSocket).to receive(:new).with("0.0.0.0", open_port).and_raise Errno::EADDRNOTAVAIL
-    expect { klass.is_port_open?("0.0.0.0", open_port) }.to raise_error Errno::EADDRNOTAVAIL
+    expect(TCPSocket).to receive(:new).with("0.0.0.0", open_port).and_raise(Errno::EADDRNOTAVAIL)
+    expect { klass.is_port_open?("0.0.0.0", open_port) }.to raise_error(Errno::EADDRNOTAVAIL)
   end
 end