diff --git a/lib/image_processing/mini_magick.rb b/lib/image_processing/mini_magick.rb
index a577397..24b9efa 100644
--- a/lib/image_processing/mini_magick.rb
+++ b/lib/image_processing/mini_magick.rb
@@ -5,18 +5,19 @@ module ImageProcessing
   module MiniMagick
     extend Chainable
 
-    # Returns whether the given image file is processable.
-    def self.valid_image?(file)
+    def self.convert_shim(&block)
       if ::MiniMagick.respond_to?(:convert)
-        ::MiniMagick.convert do |convert|
-          convert << file.path
-          convert << "null:"
-        end
+        ::MiniMagick.convert(&block)
       else
-        ::MiniMagick::Tool::Convert.new do |convert|
-          convert << file.path
-          convert << "null:"
-        end
+        ::MiniMagick::Tool::Convert.new(&block)
+      end
+    end
+
+    # Returns whether the given image file is processable.
+    def self.valid_image?(file)
+      convert_shim do |convert|
+        convert << file.path
+        convert << "null:"
       end
       true
     rescue ::MiniMagick::Error
@@ -37,7 +38,7 @@ def self.load_image(path_or_magick, loader: nil, page: nil, geometry: nil, auto_
           magick = path_or_magick
         else
           source_path = path_or_magick
-          magick = ::MiniMagick::Tool::Convert.new
+          magick = ::ImageProcessing::MiniMagick.convert_shim
 
           Utils.apply_options(magick, **options)
 
diff --git a/test/mini_magick_test.rb b/test/mini_magick_test.rb
index b899b89..36f2c24 100644
--- a/test/mini_magick_test.rb
+++ b/test/mini_magick_test.rb
@@ -14,7 +14,7 @@
   it "applies imagemagick operations" do
     actual = ImageProcessing::MiniMagick.flip.call(@portrait)
     expected = Tempfile.new(["result", ".jpg"], binmode: true).tap do |tempfile|
-      MiniMagick::Tool::Convert.new do |cmd|
+      ImageProcessing::MiniMagick.convert_shim do |cmd|
         cmd << @portrait.path
         cmd.flip
         cmd << tempfile.path
@@ -37,7 +37,7 @@
   it "applies macro operations" do
     actual = ImageProcessing::MiniMagick.resize_to_limit(400, 400).call(@portrait)
     expected = Tempfile.new(["result", ".jpg"], binmode: true).tap do |tempfile|
-      MiniMagick::Tool::Convert.new do |cmd|
+      ImageProcessing::MiniMagick.convert_shim do |cmd|
         cmd << @portrait.path
         cmd.resize("400x400")
         cmd << tempfile.path
@@ -55,7 +55,7 @@
 
   it "accepts page" do
     tiff = Tempfile.new(["file", ".tiff"])
-    MiniMagick::Tool::Convert.new do |convert|
+    ImageProcessing::MiniMagick.convert_shim do |convert|
       convert.merge! [@portrait.path, @portrait.path, @portrait.path]
       convert << tiff.path
     end
@@ -70,7 +70,7 @@
 
   it "disallows split layers by default" do
     tiff = Tempfile.new(["file", ".tiff"])
-    MiniMagick::Tool::Convert.new do |convert|
+    ImageProcessing::MiniMagick.convert_shim do |convert|
       convert.merge! [@portrait.path, @portrait.path, @portrait.path]
       convert << tiff.path
     end
@@ -168,7 +168,7 @@
   end
 
   it "accepts magick object as source" do
-    magick = MiniMagick::Tool::Convert.new
+    magick = ImageProcessing::MiniMagick.convert_shim
     magick << fixture_image("rotated.jpg").path
     result = ImageProcessing::MiniMagick.source(magick).call
     assert_dimensions [600, 800], result
@@ -568,7 +568,7 @@
     it "appends CLI arguments" do
       actual = ImageProcessing::MiniMagick.append("-resize", "400x400").call(@portrait)
       expected = Tempfile.new(["result", ".jpg"], binmode: true).tap do |tempfile|
-        MiniMagick::Tool::Convert.new do |cmd|
+        ImageProcessing::MiniMagick.convert_shim do |cmd|
           cmd << @portrait.path
           cmd.resize("400x400")
           cmd << tempfile.path