diff --git a/plugins/providers/virtualbox/cap/configure_disks.rb b/plugins/providers/virtualbox/cap/configure_disks.rb
index d790d2a18..8e9d65345 100644
--- a/plugins/providers/virtualbox/cap/configure_disks.rb
+++ b/plugins/providers/virtualbox/cap/configure_disks.rb
@@ -193,7 +193,7 @@ module VagrantPlugins
             disk_info = machine.provider.driver.get_port_and_device(defined_disk["UUID"])
 
             # clone disk to vdi formatted disk
-            vdi_disk_file = vmdk_to_vdi(machine.provider.driver, defined_disk["Location"])
+            vdi_disk_file = machine.provider.driver.vmdk_to_vdi(defined_disk["Location"])
             # resize vdi
             machine.provider.driver.resize_disk(vdi_disk_file, disk_config.size.to_i)
 
@@ -202,7 +202,7 @@ module VagrantPlugins
             machine.provider.driver.close_medium(defined_disk["UUID"])
 
             # clone back to original vmdk format and attach resized disk
-            vmdk_disk_file = vdi_to_vmdk(machine.provider.driver, vdi_disk_file)
+            vmdk_disk_file = machine.provider.driver.vdi_to_vmdk(vdi_disk_file)
             machine.provider.driver.attach_disk(disk_info[:port], disk_info[:device], vmdk_disk_file, "hdd")
 
             # close cloned volume format
@@ -225,34 +225,6 @@ module VagrantPlugins
 
           disk_metadata
         end
-
-        # TODO: Maybe these should be virtualbox driver methods?
-
-        # @param [VagrantPlugins::VirtualboxProvider::Driver] driver
-        # @param [String] defined_disk_path
-        # @return [String] destination - The cloned disk
-        def self.vmdk_to_vdi(driver, defined_disk_path)
-          LOGGER.warn("Converting disk '#{defined_disk_path}' from 'vmdk' to 'vdi' format")
-          source = defined_disk_path
-          destination = File.join(File.dirname(source), File.basename(source, ".*")) + ".vdi"
-
-          driver.clone_disk(source, destination, 'VDI')
-
-          destination
-        end
-
-        # @param [VagrantPlugins::VirtualboxProvider::Driver] driver
-        # @param [String] defined_disk_path
-        # @return [String] destination - The cloned disk
-        def self.vdi_to_vmdk(driver, defined_disk_path)
-          LOGGER.warn("Converting disk '#{defined_disk_path}' from 'vdi' to 'vmdk' format")
-          source = defined_disk_path
-          destination = File.join(File.dirname(source), File.basename(source, ".*")) + ".vmdk"
-
-          driver.clone_disk(source, destination, 'VMDK')
-
-          destination
-        end
       end
     end
   end
diff --git a/plugins/providers/virtualbox/driver/meta.rb b/plugins/providers/virtualbox/driver/meta.rb
index 470149515..7175112ba 100644
--- a/plugins/providers/virtualbox/driver/meta.rb
+++ b/plugins/providers/virtualbox/driver/meta.rb
@@ -147,9 +147,11 @@ module VagrantPlugins
           :ssh_port,
           :start,
           :suspend,
+          :vdi_to_vmdk,
           :verify!,
           :verify_image,
-          :vm_exists?
+          :vm_exists?,
+          :vmdk_to_vdi
 
         protected
 
diff --git a/plugins/providers/virtualbox/driver/version_5_0.rb b/plugins/providers/virtualbox/driver/version_5_0.rb
index a5f872ae2..7220bb5d9 100644
--- a/plugins/providers/virtualbox/driver/version_5_0.rb
+++ b/plugins/providers/virtualbox/driver/version_5_0.rb
@@ -894,6 +894,30 @@ module VagrantPlugins
           return true
         end
 
+        # @param [VagrantPlugins::VirtualboxProvider::Driver] driver
+        # @param [String] defined_disk_path
+        # @return [String] destination - The cloned disk
+        def vmdk_to_vdi(defined_disk_path)
+          source = defined_disk_path
+          destination = File.join(File.dirname(source), File.basename(source, ".*")) + ".vdi"
+
+          clone_disk(source, destination, 'VDI')
+
+          destination
+        end
+
+        # @param [VagrantPlugins::VirtualboxProvider::Driver] driver
+        # @param [String] defined_disk_path
+        # @return [String] destination - The cloned disk
+        def vdi_to_vmdk(defined_disk_path)
+          source = defined_disk_path
+          destination = File.join(File.dirname(source), File.basename(source, ".*")) + ".vmdk"
+
+          clone_disk(source, destination, 'VMDK')
+
+          destination
+        end
+
         protected
 
         def valid_ip_address?(ip)