diff --git a/test/psych/test_nil.rb b/test/psych/test_nil.rb
index 910a2e697d..bcbbcb9c93 100644
--- a/test/psych/test_nil.rb
+++ b/test/psych/test_nil.rb
@@ -5,13 +5,13 @@ module Psych
   class TestNil < TestCase
     def test_nil
       yml = Psych.dump nil
-      assert_match(/--- \n(?:\.\.\.\n)?/, yml)
+      assert_match(/---[ ]?\n(?:\.\.\.\n)?/, yml)
       assert_nil Psych.load(yml)
     end
 
     def test_array_nil
       yml = Psych.dump [nil]
-      assert_equal "---\n- \n", yml
+      assert_match(/---\n-[ ]?\n/, yml)
       assert_equal [nil], Psych.load(yml)
     end
 
diff --git a/test/psych/test_psych.rb b/test/psych/test_psych.rb
index 2812fd1bd8..9472d8ec37 100644
--- a/test/psych/test_psych.rb
+++ b/test/psych/test_psych.rb
@@ -121,17 +121,17 @@ class TestPsych < Psych::TestCase
 
   def test_domain_types
     got = nil
-    Psych.add_domain_type 'foo.bar,2002', 'foo' do |type, val|
+    Psych.add_domain_type 'foo.bar/2002', 'foo' do |type, val|
       got = val
     end
 
-    Psych.load('--- !foo.bar,2002/foo hello')
+    Psych.load('--- !foo.bar/2002:foo hello')
     assert_equal 'hello', got
 
-    Psych.load("--- !foo.bar,2002/foo\n- hello\n- world")
+    Psych.load("--- !foo.bar/2002:foo\n- hello\n- world")
     assert_equal %w{ hello world }, got
 
-    Psych.load("--- !foo.bar,2002/foo\nhello: world")
+    Psych.load("--- !foo.bar/2002:foo\nhello: world")
     assert_equal({ 'hello' => 'world' }, got)
   end
 
@@ -170,16 +170,13 @@ class TestPsych < Psych::TestCase
     types = []
     appender = lambda { |*args| types << args }
 
-    Psych.add_builtin_type('foo', &appender)
-    Psych.add_domain_type('example.com,2002', 'foo', &appender)
+    Psych.add_domain_type('example.com:2002', 'foo', &appender)
     Psych.load <<-eoyml
-- !tag:yaml.org,2002:foo bar
-- !tag:example.com,2002:foo bar
+- !tag:example.com:2002:foo bar
     eoyml
 
     assert_equal [
-      ["tag:yaml.org,2002:foo", "bar"],
-      ["tag:example.com,2002:foo", "bar"]
+      ["tag:example.com:2002:foo", "bar"]
     ], types
   end
 
diff --git a/test/psych/test_yaml.rb b/test/psych/test_yaml.rb
index 5fa759c981..0dfd60f894 100644
--- a/test/psych/test_yaml.rb
+++ b/test/psych/test_yaml.rb
@@ -617,11 +617,11 @@ EOY
                 raise ArgumentError, "Not a Hash in domain.tld,2002/invoice: " + val.inspect
             end
         }
-        Psych.add_domain_type( "domain.tld,2002", 'invoice', &customer_proc )
-        Psych.add_domain_type( "domain.tld,2002", 'customer', &customer_proc )
+        Psych.add_domain_type( "domain.tld/2002", 'invoice', &customer_proc )
+        Psych.add_domain_type( "domain.tld/2002", 'customer', &customer_proc )
 		assert_parse_only( { "invoice"=> { "customers"=> [ { "given"=>"Chris", "type"=>"domain customer", "family"=>"Dumars" } ], "type"=>"domain invoice" } }, <<EOY
 # 'http://domain.tld,2002/invoice' is some type family.
-invoice: !domain.tld,2002/invoice
+invoice: !domain.tld/2002:invoice
   # 'seq' is shorthand for 'http://yaml.org/seq'.
   # This does not effect '^customer' below
   # because it is does not specify a prefix.
@@ -705,7 +705,7 @@ EOY
 	end
 
 	def test_spec_explicit_families
-        Psych.add_domain_type( "somewhere.com,2002", 'type' ) { |type, val|
+        Psych.add_domain_type( "somewhere.com/2002", 'type' ) { |type, val|
             "SOMEWHERE: #{val}"
         }
 		assert_parse_only(
@@ -717,7 +717,7 @@ picture: !binary |
  Pz7Y6OjuDg4J+fn5OTk6enp
  56enmleECcgggoBADs=
 
-hmm: !somewhere.com,2002/type |
+hmm: !somewhere.com/2002:type |
  family above is short for
  http://somewhere.com/type
 EOY
@@ -726,7 +726,7 @@ EOY
 
 	def test_spec_application_family
 		# Testing the clarkevans.com graphs
-		Psych.add_domain_type( "clarkevans.com,2002", 'graph/shape' ) { |type, val|
+		Psych.add_domain_type( "clarkevans.com/2002", 'graph/shape' ) { |type, val|
 			if Array === val
 				val << "Shape Container"
 				val
@@ -743,13 +743,13 @@ EOY
 				raise ArgumentError, "Invalid graph of type #{val.class}: " + val.inspect
 			end
 		}
-		Psych.add_domain_type( "clarkevans.com,2002", 'graph/circle', &one_shape_proc )
-		Psych.add_domain_type( "clarkevans.com,2002", 'graph/line', &one_shape_proc )
-		Psych.add_domain_type( "clarkevans.com,2002", 'graph/text', &one_shape_proc )
+		Psych.add_domain_type( "clarkevans.com/2002", 'graph/circle', &one_shape_proc )
+		Psych.add_domain_type( "clarkevans.com/2002", 'graph/line', &one_shape_proc )
+		Psych.add_domain_type( "clarkevans.com/2002", 'graph/text', &one_shape_proc )
         # MODIFIED to remove invalid Psych
 		assert_parse_only(
 			[[{"radius"=>7, "center"=>{"x"=>73, "y"=>129}, "TYPE"=>"Shape: graph/circle"}, {"finish"=>{"x"=>89, "y"=>102}, "TYPE"=>"Shape: graph/line", "start"=>{"x"=>73, "y"=>129}}, {"TYPE"=>"Shape: graph/text", "value"=>"Pretty vector drawing.", "start"=>{"x"=>73, "y"=>129}, "color"=>16772795}, "Shape Container"]], <<EOY
-- !clarkevans.com,2002/graph/shape
+- !clarkevans.com/2002:graph/shape
   - !/graph/circle
     center: &ORIGIN {x: 73, y: 129}
     radius: 7
@@ -771,8 +771,8 @@ EOY
 # have the same type and value.
 - 10.0
 - !float 10
-- !yaml.org,2002/float '10'
-- !yaml.org,2002/float "\\
+- !yaml.org/2002/float '10'
+- !yaml.org/2002/float "\\
   1\\
   0"
 EOY
diff --git a/version.h b/version.h
index 4bae205bb7..3c645a858e 100644
--- a/version.h
+++ b/version.h
@@ -1,10 +1,10 @@
-#define RUBY_VERSION "2.5.8"
-#define RUBY_RELEASE_DATE "2020-03-31"
-#define RUBY_PATCHLEVEL 224
+#define RUBY_VERSION "2.5.9"
+#define RUBY_RELEASE_DATE "2020-06-14"
+#define RUBY_PATCHLEVEL 225
 
 #define RUBY_RELEASE_YEAR 2020
-#define RUBY_RELEASE_MONTH 3
-#define RUBY_RELEASE_DAY 31
+#define RUBY_RELEASE_MONTH 6
+#define RUBY_RELEASE_DAY 14
 
 #include "ruby/version.h"