diff --git a/mrbgems/mruby-bin-debugger/bintest/print.rb b/mrbgems/mruby-bin-debugger/bintest/print.rb
index c475cf688..27a20e2f2 100644
--- a/mrbgems/mruby-bin-debugger/bintest/print.rb
+++ b/mrbgems/mruby-bin-debugger/bintest/print.rb
@@ -434,10 +434,10 @@ SRC
 
   tc << {:cmd=>'p {}',                              :exp=>'$1 = {}'}
   tc << {:cmd=>'p {"one"=>1,"two"=>2}',             :exp=>'$2 = {"one" => 1, "two" => 2}'}
-  tc << {:cmd=>'p {:eins=>"1", :zwei=>"2",}',       :exp=>'$3 = {:eins => "1", :zwei => "2"}'}
-  tc << {:cmd=>'p {uno:"one", dos: 2}',             :exp=>'$4 = {:uno => "one", :dos => 2}'}
-  tc << {:cmd=>'p {"one"=>1, :zwei=>2, tres:3}',    :exp=>'$5 = {"one" => 1, :zwei => 2, :tres => 3}'}
-  tc << {:cmd=>'p {:foo=>"#{foo}",:bar=>"#{bar}"}', :exp=>'$6 = {:foo => "foo", :bar => "bar"}'}
+  tc << {:cmd=>'p {eins: "1", zwei: "2",}',         :exp=>'$3 = {eins: "1", zwei: "2"}'}
+  tc << {:cmd=>'p {uno: "one", dos: 2}',            :exp=>'$4 = {uno: "one", dos: 2}'}
+  tc << {:cmd=>'p {"one"=>1, zwei: 2, tres: 3}',    :exp=>'$5 = {"one" => 1, zwei: 2, tres: 3}'}
+  tc << {:cmd=>'p {foo: "#{foo}",bar: "#{bar}"}',   :exp=>'$6 = {foo: "foo", bar: "bar"}'}
 
   BinTest_MrubyBinDebugger.test(src, tc)
 end
diff --git a/test/t/array.rb b/test/t/array.rb
index 240aeb86e..57a6b6b69 100644
--- a/test/t/array.rb
+++ b/test/t/array.rb
@@ -33,7 +33,7 @@ assert('Array#*', '15.2.12.5.2') do
   assert_equal([1, 1, 1], [1].*(3))
   assert_equal([], [1].*(0))
   assert_equal('abc', ['a', 'b', 'c'].*(''))
-  assert_equal('0, 0, 1, {:foo => 0}', [0, [0, 1], {foo: 0}].*(', '))
+  assert_equal('0, 0, 1, {foo: 0}', [0, [0, 1], {foo: 0}].*(', '))
 end
 
 assert('Array#<<', '15.2.12.5.3') do
diff --git a/test/t/hash.rb b/test/t/hash.rb
index 17342433e..3f09ceae7 100644
--- a/test/t/hash.rb
+++ b/test/t/hash.rb
@@ -857,10 +857,10 @@ end
   assert("Hash##{meth}") do
     assert_equal('{}', Hash.new.__send__(meth))
 
-    h1 = {:s => 0, :a => [1,2], 37 => :b, :d => "del", "c" => nil}
+    h1 = {s: 0, a: [1,2], 37 => :b, d: "del", "c" => nil}
     h1.shift
     h1.delete(:d)
-    s1 = ':a => [1, 2], 37 => :b, "c" => nil'
+    s1 = 'a: [1, 2], 37 => :b, "c" => nil'
     h2 = Hash.new(100)
 
     (1..14).each{h2[_1] = _1 * 2}
@@ -874,7 +874,7 @@ end
       hh = {}
       hh[:recur] = hh
       h.each{|k, v| hh[k] = v}
-      assert_equal("{:recur => {...}, #{s}}", hh.__send__(meth))
+      assert_equal("{recur: {...}, #{s}}", hh.__send__(meth))
 
       hh = h.dup
       hh[hh] = :recur
diff --git a/test/t/literals.rb b/test/t/literals.rb
index 54bcbc716..03f0cb699 100644
--- a/test/t/literals.rb
+++ b/test/t/literals.rb
@@ -233,8 +233,8 @@ ZZZ
   assert_equal "  iii\n", i
   assert_equal ["  j1j\n", "  j2j\n", "  j\#{3}j\n"], j
   assert_equal 123, k
-  assert_equal ["x{:x => \"mm3\\n\"}y\nmm1\n", "mm2\n"], m
-  assert_equal ({:x=>"mm3\n"}), m2
+  assert_equal ["x{x: \"mm3\\n\"}y\nmm1\n", "mm2\n"], m
+  assert_equal ({x: "mm3\n"}), m2
   assert_equal [1, "nn1\n", 3, 4], n
   assert_equal "a $ q\n $ c $ d", q1
   assert_equal "l $ mqq\nn $ o", q2
diff --git a/test/t/vformat.rb b/test/t/vformat.rb
index dbf0114d3..956870e02 100644
--- a/test/t/vformat.rb
+++ b/test/t/vformat.rb
@@ -39,7 +39,7 @@ assert('mrb_vformat') do
   assert_equal 'Class', vf.v('%Y', sclass({}))
   assert_match '#<Class:#<String:0x*>>', vf.v('%v', sclass(""))
   assert_equal '`v`: 1...3', vf.v('`v`: %v', 1...3)
-  assert_equal '`S`: {:a => 1, "b" => "c"}', vf.v('`S`: %S', {a: 1, "b" => ?c})
+  assert_equal '`S`: {a: 1, "b" => "c"}', vf.v('`S`: %S', {a: 1, "b" => ?c})
   assert_equal 'percent: %', vf.z('percent: %%')
   assert_equal '"I": inspect char', vf.c('%!c: inspect char', ?I)
   assert_equal '709: inspect mrb_int', vf.i('%!d: inspect mrb_int', 709)