3 files changed, 19 insertions, 0 deletions
diff --git a/test/t/array.rb b/test/t/array.rb
index 9cc2f64ad..cf7ed4704 100644
--- a/test/t/array.rb
+++ b/test/t/array.rb
@@ -373,3 +373,10 @@ assert("Array#rindex") do
   $a = [2, 3, 4, 5, 6, 7, 8, 9, 10, Sneaky.new]
   assert_equal 0, $a.rindex(1)
 end
+
+assert('Array#freeze') do
+  a = [].freeze
+  assert_raise(RuntimeError) do
+    a[0] = 1
+  end
+end
diff --git a/test/t/hash.rb b/test/t/hash.rb
index f076db8e5..c63b8c009 100644
--- a/test/t/hash.rb
+++ b/test/t/hash.rb
@@ -366,3 +366,10 @@ assert('Hash#rehash') do
   h.rehash
   assert_equal("b", h[[:b]])
 end
+
+assert('Hash#freeze') do
+  h = {}.freeze
+  assert_raise(RuntimeError) do
+    h[:a] = 'b'
+  end
+end
diff --git a/test/t/kernel.rb b/test/t/kernel.rb
index e59bd6a10..42abed9df 100644
--- a/test/t/kernel.rb
+++ b/test/t/kernel.rb
@@ -257,6 +257,11 @@ assert('Kernel#extend works on toplevel', '15.3.1.3.13') do
   assert_true respond_to?(:test_method)
 end
 
+assert('Kernel#freeze') do
+  obj = Object.new
+  assert_equal obj, obj.freeze
+end
+
 assert('Kernel#global_variables', '15.3.1.3.14') do
   assert_equal Array, global_variables.class
 end