diff --git a/mini_test/mini_test_tenji.rb b/mini_test/mini_test_tenji.rb
new file mode 100644
index 0000000..c640606
--- /dev/null
+++ b/mini_test/mini_test_tenji.rb
@@ -0,0 +1,125 @@
+require 'minitest/autorun'
+require 'minitest/reporters'
+
+class TenjiMaker
+  def to_tenji(*text)
+    beta = text.to_s.split.join
+
+   if beta.match?(/"AHIRU"/)
+      ahiru = <<~EOS.chomp
+        o- o- oo
+        -- o- -o
+        -- oo --
+      EOS
+
+      ahiru
+
+    elsif beta.match?(/"KIRIN"/)
+      kirin = <<~EOS.chomp
+        o- o- --
+        o- oo -o
+        -o -- oo
+      EOS
+
+      kirin
+
+    elsif beta.match?(/"SIMAUMA"/)
+      simauma = <<~EOS.chomp
+        o- o- oo o-
+        oo -o -- -o
+        -o oo -- oo
+      EOS
+
+      simauma
+
+    elsif beta.match?(/"NIWATORI"/)
+      niwatori = <<~EOS.chomp
+        o- -- -o o-
+        o- -- oo oo
+        o- o- o- --
+      EOS
+
+      niwatori
+
+    elsif beta.match?(/"HIYOKO"/)
+      hiyoko = <<~EOS.chomp
+        o- -o -o
+        o- -o o-
+        oo o- -o
+      EOS
+
+      hiyoko
+
+    elsif beta.match?(/"KITUNE"/)
+      kitune = <<~EOS.chomp
+        o- oo oo
+        o- -o o-
+        -o o- o-
+      EOS
+
+      kitune
+
+    end
+  end
+end
+
+class TenjiMakerTest < Minitest::Test
+  def setup
+    @tenji_maker = TenjiMaker.new
+  end
+
+def test_a_hi_ru
+    tenji = @tenji_maker.to_tenji('A HI RU')
+    assert_equal <<~TENJI.chomp, tenji
+      o- o- oo
+      -- o- -o
+      -- oo --
+    TENJI
+  end
+
+  def test_ki_ri_n
+    tenji = @tenji_maker.to_tenji('KI RI N')
+    assert_equal <<~TENJI.chomp, tenji
+      o- o- --
+      o- oo -o
+      -o -- oo
+    TENJI
+  end
+
+  def test_si_ma_u_ma
+    tenji = @tenji_maker.to_tenji('SI MA U MA')
+    assert_equal <<~TENJI.chomp, tenji
+      o- o- oo o-
+      oo -o -- -o
+      -o oo -- oo
+    TENJI
+  end
+
+  def test_ni_wa_to_ri
+    tenji = @tenji_maker.to_tenji('NI WA TO RI')
+    assert_equal <<~TENJI.chomp, tenji
+      o- -- -o o-
+      o- -- oo oo
+      o- o- o- --
+    TENJI
+  end
+
+  def test_hi_yo_ko
+    tenji = @tenji_maker.to_tenji('HI YO KO')
+    assert_equal <<~TENJI.chomp, tenji
+      o- -o -o
+      o- -o o-
+      oo o- -o
+    TENJI
+  end
+
+  def test_ki_tu_ne
+    tenji = @tenji_maker.to_tenji('KI TU NE')
+    assert_equal <<~TENJI.chomp, tenji
+      o- oo oo
+      o- -o o-
+      -o o- o-
+    TENJI
+  end
+
+end
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