diff --git a/lib/oci8.rb b/lib/oci8.rb
index f6ad02b4..068a9ce6 100644
--- a/lib/oci8.rb
+++ b/lib/oci8.rb
@@ -147,6 +147,8 @@ class OCI8
   ORAVER_12_1 = OCI8::OracleVersion.new(12, 1)
   # @private
   ORAVER_18 = OCI8::OracleVersion.new(18)
+  # @private
+  ORAVER_23 = OCI8::OracleVersion.new(23)
 
   # @private
   @@oracle_client_version = OCI8::OracleVersion.new(self.oracle_client_vernum)
diff --git a/test/test_oranumber.rb b/test/test_oranumber.rb
index f116ae7e..8581cf9f 100644
--- a/test/test_oranumber.rb
+++ b/test/test_oranumber.rb
@@ -697,7 +697,9 @@ def run_test_new_from_string(cursor, str)
         OraNumber.new(str)
         flunk("exception expected but none was thrown. test data: " + str)
       rescue
-        assert_equal(oraerr.to_s, $!.to_s, "test data: " + str)
+        expected_errhead = oraerr.to_s.gsub(/:.*/m, '') # strip chars after ':'
+        actual_errhead = $!.to_s.gsub(/:.*/m, '')
+        assert_equal(expected_errhead, actual_errhead, "test data: " + str)
       end
     end
     if onum
diff --git a/test/test_package_type.rb b/test/test_package_type.rb
index 95202183..d4397338 100644
--- a/test/test_package_type.rb
+++ b/test/test_package_type.rb
@@ -47,6 +47,12 @@ def check_attributes(msg, obj, attrs)
   end
 
   def test_describe_package
+    if $oracle_server_version >= OCI8::ORAVER_23
+      boolean_type_name = 'BOOLEAN'
+    else
+      boolean_type_name = 'PL/SQL BOOLEAN'
+    end
+
     integer_type_attrs = {
       :class => OCI8::Metadata::Type,
       #:typecode => nil,
@@ -127,7 +133,7 @@ def test_describe_package
       #:map_method => nil,
       #:order_method => nil,
       :is_invoker_rights? => false,
-      :name => 'PL/SQL BOOLEAN',
+      :name => boolean_type_name,
       :schema_name => 'SYS',
       :is_final_type? => true,
       :is_instantiable_type? => true,
@@ -137,7 +143,7 @@ def test_describe_package
       :package_name => nil,
       :type_attrs => [],
       #:type_methods => [],
-      :inspect => '#<OCI8::Metadata::Type:(0) SYS.PL/SQL BOOLEAN>', # TODO: change to "BOOLEAN"
+      :inspect => "#<OCI8::Metadata::Type:(0) SYS.#{boolean_type_name}>",
     }
 
     varchar2_type_attrs = {
@@ -277,7 +283,7 @@ def test_describe_package
         :num_elems => 0,
         :precision => 0,
         :scale => 0,
-        :type_name => 'PL/SQL BOOLEAN',
+        :type_name => boolean_type_name,
         :schema_name => 'SYS',
         :type_metadata => boolean_type_attrs,
         :inspect => '#<OCI8::Metadata::Collection: BOOLEAN>',
@@ -444,7 +450,7 @@ def test_describe_package
           :name => 'B',
           :precision => 0,
           :scale => 0,
-          :type_name => 'PL/SQL BOOLEAN',
+          :type_name => boolean_type_name,
           :schema_name => 'SYS',
           :fsprecision => 0,
           :lfprecision => 0,