2 files changed, 5 insertions, 3 deletions
diff --git a/mrbgems/mruby-string-ext/test/fixnum.rb b/mrbgems/mruby-string-ext/test/fixnum.rb
deleted file mode 100644
index 9036b1a06..000000000
--- a/mrbgems/mruby-string-ext/test/fixnum.rb
+++ /dev/null
@@ -1,3 +0,0 @@
-assert('Fixnum#chr') do
-  assert_equal "a", 97.chr
-end
diff --git a/mrbgems/mruby-string-ext/test/numeric.rb b/mrbgems/mruby-string-ext/test/numeric.rb
new file mode 100644
index 000000000..cae562fc1
--- /dev/null
+++ b/mrbgems/mruby-string-ext/test/numeric.rb
@@ -0,0 +1,5 @@
+assert('Integer#chr') do
+  assert_equal("A", 65.chr)
+  assert_equal("B", 0x42.chr)
+  assert_raise(RangeError) { -1.chr }
+end