diff --git a/ruby/t/tc_canvas.rb b/ruby/t/tc_canvas.rb
index ad03ede..d3d466a 100644
--- a/ruby/t/tc_canvas.rb
+++ b/ruby/t/tc_canvas.rb
@@ -7,23 +7,41 @@ class TC_Canvas < Test::Unit::TestCase
     end
     def test_create
         c = Cucul::Canvas.new(3, 3)
-        assert(c, 'Canvas creation failed')
+        assert_not_nil(c, 'Canvas creation failed')
         assert(c.width == 3 && c.height == 3, 'Wrong size for new canvas')
     end
     def test_width
-    @c.width=42
-        assert_equal(c.width, 42, 'Failed to set width')
+        @c.width = 42
+        assert_equal(42, @c.width, 'Failed to set width with =')
+        @c.set_width(24)
+        assert_equal(24, @c.width, 'Failed to set width')
     end
     def test_height
-        @c.height=42
-        assert_equal(c.height, 42, 'Failed to set width')
+        @c.height = 42
+        assert_equal(42, @c.height, 'Failed to set height with =')
+        @c.set_height(24)
+        assert_equal(24, @c.height, 'Failed to set height')
     end
     def test_size
-    @c.set_size(100,100)
+        @c.set_size(100,100)
         assert(@c.width == 100 && @c.height == 100, 'Failed to set size')
     end
     def test_import
         @c.import_memory("foo", "")
-        assert_equal(@c.export_memory("irc"), "foo\r\n", "Import/Export failed")
+        assert_equal("foo\r\n", @c.export_memory("irc"), "Import/Export failed")
+    end
+    def test_cursor
+        @c.gotoxy(1,1)
+        assert_equal(1, @c.cursor_x)
+        assert_equal(1, @c.cursor_y)
+    end
+    def test_clear
+        @c.put_char(1, 1, 64)
+        @c.clear
+        assert_equal("", @c.export_memory("irc").strip, "Failed to clear canvas")
+    end
+    def test_char
+        @c.put_char(1, 1, 42)
+        assert_equal(42, @c.get_char(1,1))
     end
 end