diff --git a/CHANGELOG.md b/CHANGELOG.md
index addf01a..a660d05 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+## [0.2.0] - [unreleased]
+
+- Add mention about compliance and passed tests in README.
+- Declare global variables with `rb_global_variable`.
+It may prevent VM from crashing in some cases.
+
 ## [0.1.0] - 2022-08-02
 
-Initial release
+- Initial release
diff --git a/README.md b/README.md
index a868b5c..cd60d2a 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,11 @@
 Tomlib is a TOML parser and generator for Ruby. It is fast and standards-compliant by relying
 on native [tomlc99](https://github.com/cktan/tomlc99) parser.
 
+## Compliance
+
 Tomlib is TOML v1.0 compliant.
+It passes both [BurntSushi/toml-test](https://github.com/BurntSushi/toml-test) and
+[iarna/toml-spec-tests](https://github.com/iarna/toml-spec-tests).
 
 ## Installation
 
diff --git a/lib/tomlib.rb b/lib/tomlib.rb
index 5bfe44d..0488e98 100644
--- a/lib/tomlib.rb
+++ b/lib/tomlib.rb
@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 require 'date'
+
 require_relative 'tomlib/dumper'
 require_relative 'tomlib/tomlib'
 require_relative 'tomlib/version'
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index d2b77ca..93624b2 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,6 +1,17 @@
 # frozen_string_literal: true
 
 require 'simplecov'
+require 'tomlib'
+
+if GC.respond_to?(:verify_compaction_references)
+  # This method was added in Ruby 3.0.0. Calling it this way asks the GC to
+  # move objects around, helping to find object movement bugs.
+  begin
+    GC.verify_compaction_references(double_heap: true, toward: :empty)
+  rescue NotImplementedError
+    # Some platforms don't support compaction
+  end
+end
 
 SimpleCov.start do
   add_filter '/spec/'
@@ -106,15 +117,3 @@
   Kernel.srand config.seed
 =end
 end
-
-require 'tomlib'
-
-if GC.respond_to?(:verify_compaction_references)
-  # This method was added in Ruby 3.0.0. Calling it this way asks the GC to
-  # move objects around, helping to find object movement bugs.
-  begin
-    GC.verify_compaction_references(double_heap: true, toward: :empty)
-  rescue NotImplementedError
-    # Some platforms don't support compaction
-  end
-end