diff --git a/test/connection_test.rb b/test/connection_test.rb
index 9ce60e9..f942b8e 100644
--- a/test/connection_test.rb
+++ b/test/connection_test.rb
@@ -16,10 +16,6 @@ class TestConnection < Test::Unit::TestCase
     @mongo[MONGO_TEST_DB].get_last_error
   end
 
-  def test_slave_ok_with_multiple_nodes
-
-  end
-
   def test_server_info
     server_info = @mongo.server_info
     assert server_info.keys.include?("version")
diff --git a/test/db_api_test.rb b/test/db_api_test.rb
index 41584b5..c32ea19 100644
--- a/test/db_api_test.rb
+++ b/test/db_api_test.rb
@@ -739,7 +739,12 @@ class DBAPITest < Test::Unit::TestCase
       utf8 = "hello world".encode("UTF-8")
       iso8859 = "hello world".encode("ISO-8859-1")
 
-      assert_equal "US-ASCII", ascii.encoding.name
+      if RUBY_PLATFORM =~ /jruby/
+        assert_equal "ASCII-8BIT", ascii.encoding.name
+      else
+        assert_equal "US-ASCII", ascii.encoding.name
+      end
+
       assert_equal "UTF-8", utf8.encoding.name
       assert_equal "ISO-8859-1", iso8859.encoding.name
 
diff --git a/test/test_helper.rb b/test/test_helper.rb
index 348684e..4d9cb78 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -19,7 +19,7 @@ MSG
     exit
 end
 
-require 'bson_ext/cbson' if ENV['C_EXT']
+require 'bson_ext/cbson' if !(RUBY_PLATFORM =~ /java/) && ENV['C_EXT']
 
 unless defined? MONGO_TEST_DB
   MONGO_TEST_DB = 'mongo-ruby-test'
@@ -47,7 +47,7 @@ class Test::Unit::TestCase
   end
 
   def self.mongo_port
-    ENV['MONGO_RUBY_DRIVER_PORT'].to_i || 27017
+    ENV['MONGO_RUBY_DRIVER_PORT'] ? ENV['MONGO_RUBY_DRIVER_PORT'].to_i : 27017
   end
 
   def host_port