diff --git a/test/test_error.rb b/test/test_error.rb
index 992d11b8..df74b9eb 100644
--- a/test/test_error.rb
+++ b/test/test_error.rb
@@ -72,7 +72,7 @@ def test_get_handler
       LibXML::XML::Error.reset_handler
     end
     if saved_handler.nil?
-      assert_nil(LibXML::XML::get_handler)
+      assert_nil(LibXML::XML::Error.get_handler)
     else
       assert_equal(LibXML::XML::Error.get_handler, saved_handler)
     end
diff --git a/test/test_writer.rb b/test/test_writer.rb
index 1289e7aa..61c3a552 100644
--- a/test/test_writer.rb
+++ b/test/test_writer.rb
@@ -468,7 +468,7 @@ def test_string_writer_does_not_leak_memory
       rss_by_round << rss
     end
 
-    assert_operator(rss_by_round.last - rss_by_round[1], :<, 5_000)
+    assert_operator(rss_by_round.last - rss_by_round[1], :<, 10_000)
   end
 
   private