diff --git a/mk/check.mk b/mk/check.mk
index 8c348d02b32..5ee706d38db 100644
--- a/mk/check.mk
+++ b/mk/check.mk
@@ -20,7 +20,10 @@ $(eval $(call DEF_SUBMODULE_TEST_RULES,$(submodule))))
 servo-test: $(DEPS_servo)
 	$(CFG_RUSTC) $(RFLAGS_servo) --test -o $@ $<
 
-reftest: src/reftest/reftest.rs servo
+reftest: $(S)src/reftest/reftest.rs servo
+	$(CFG_RUSTC) $(RFLAGS_servo) -o $@ $< -L .
+
+contenttest: $(S)src/contenttest/contenttest.rs servo
 	$(CFG_RUSTC) $(RFLAGS_servo) -o $@ $< -L .
 
 .PHONY: check $(DEPS_CHECK)
@@ -31,5 +34,7 @@ check-servo: servo-test
 	./servo-test $(TESTNAME)
 
 check-ref: reftest
-	./reftest --source-dir=$(VPATH)/src/test/ref --work-dir=src/test/ref $(TESTNAME)
+	./reftest --source-dir=$(VPATH)/test/ref --work-dir=src/test/ref $(TESTNAME)
 
+check-content: contenttest
+	./contenttest --source-dir=$(VPATH)/test/content $(TESTNAME)
diff --git a/src/contenttest/contenttest.rs b/src/contenttest/contenttest.rs
new file mode 100644
index 00000000000..6ffc18a8a05
--- /dev/null
+++ b/src/contenttest/contenttest.rs
@@ -0,0 +1,73 @@
+extern mod std;
+
+use std::test::{TestOpts, run_tests_console, TestDesc};
+use std::getopts::{getopts, reqopt, opt_str, fail_str};
+use os::list_dir_path;
+
+struct Config {
+    source_dir: ~str,
+    filter: Option<~str>
+}
+
+fn main(args: ~[~str]) {
+    let config = parse_config(args);
+    let opts = test_options(config);
+    let tests = find_tests(config);
+    run_tests_console(&opts, tests);
+}
+
+fn parse_config(args: ~[~str]) -> Config {
+    let args = args.tail();
+    let opts = ~[reqopt(~"source-dir")];
+    let matches = match getopts(args, opts) {
+      Ok(m) => m,
+      Err(f) => fail fail_str(f)
+    };
+
+    Config {
+        source_dir: opt_str(matches, ~"source-dir"),
+        filter: if matches.free.is_empty() {
+            None
+        } else {
+            Some(matches.free.head())
+        }
+    }
+}
+
+fn test_options(config: Config) -> TestOpts {
+    {
+        filter: config.filter,
+        run_ignored: false,
+        logfile: None
+    }
+}
+
+fn find_tests(config: Config) -> ~[TestDesc] {
+    let all_files = list_dir_path(&Path(config.source_dir));
+    let html_files = all_files.filter( |file| file.to_str().ends_with(".html") );
+    return html_files.map(|file| make_test(config, (*file).to_str()) );
+}
+
+fn make_test(config: Config, file: ~str) -> TestDesc {
+    {
+        name: file,
+        testfn: fn~() { run_test(config, file) },
+        ignore: false,
+        should_fail: false
+    }
+}
+
+fn run_test(config: Config, file: ~str) {
+    let infile = ~"file://" + os::make_absolute(&Path(file)).to_str();
+    let res = run::program_output("./servo", ~[infile]);
+    io::print(res.out);
+    do str::split_char_each(res.out, '\n') |line| {
+        if line.contains("TEST-UNEXPECTED-FAIL") {
+            fail str::from_slice(line);
+        }
+        true
+    }
+}
+
+fn render_servo(config: Config, file: ~str) {
+}
diff --git a/src/servo/content/content_task.rs b/src/servo/content/content_task.rs
index 67019edc29b..d55e1f082e1 100644
--- a/src/servo/content/content_task.rs
+++ b/src/servo/content/content_task.rs
@@ -51,7 +51,7 @@ use ptr::null;
 enum ControlMsg {
     ParseMsg(Url),
     ExecuteMsg(Url),
-    Timer(~dom::base::TimerData),
+    Timer(~dom::window::TimerData),
     ExitMsg
 }
 
diff --git a/src/servo/dom/bindings/window.rs b/src/servo/dom/bindings/window.rs
index edb81aa418a..6effce5dd60 100644
--- a/src/servo/dom/bindings/window.rs
+++ b/src/servo/dom/bindings/window.rs
@@ -45,6 +45,12 @@ extern fn setTimeout(cx: *JSContext, argc: c_uint, vp: *jsval) -> JSBool unsafe
     return 1;
 }
 
+extern fn close(cx: *JSContext, argc: c_uint, vp: *jsval) -> JSBool unsafe {
+    (*unwrap(JS_THIS_OBJECT(cx, vp))).payload.close();
+    JS_SET_RVAL(cx, vp, JSVAL_NULL);
+    return 1;
+}
+
 unsafe fn unwrap(obj: *JSObject) -> *rust_box<Window> {
     let val = JS_GetReservedSlot(obj, 0);
     cast::reinterpret_cast(&RUST_JSVAL_TO_PRIVATE(val))
@@ -76,6 +82,11 @@ fn init(compartment: bare_compartment, win: @Window) {
                      call: {op: setTimeout, info: null()},
                      nargs: 2,
                      flags: 0,
+                     selfHostedName: null()},
+                    {name: compartment.add_name(~"close"),
+                     call: {op: close, info: null()},
+                     nargs: 2,
+                     flags: 0,
                      selfHostedName: null()}];
 
     vec::as_imm_buf(methods, |fns, _len| {
diff --git a/src/servo/dom/window.rs b/src/servo/dom/window.rs
index ac37628af9b..6bc74913ad8 100644
--- a/src/servo/dom/window.rs
+++ b/src/servo/dom/window.rs
@@ -1,9 +1,12 @@
 use comm::{Port, Chan};
-use content::content_task::{ControlMsg, Timer};
+use content::content_task::{ControlMsg, Timer, ExitMsg};
+use js::jsapi::jsval;
+use dvec::DVec;
 
 enum TimerControlMsg {
     TimerMessage_Fire(~TimerData),
-    TimerMessage_Close
+    TimerMessage_Close,
+    TimerMessage_TriggerExit //XXXjdm this is just a quick hack to talk to the content task
 }
 
 struct Window {
@@ -43,6 +46,10 @@ impl Window {
         io::println(#fmt("ALERT: %s", s));
     }
 
+    fn close() {
+        self.timer_chan.send(TimerMessage_TriggerExit);
+    }
+
     fn setTimeout(&self, timeout: int, argc: libc::c_uint, argv: *jsval) {
         let timeout = int::max(0, timeout) as uint;
 
@@ -65,6 +72,7 @@ fn Window(content_port: Port<ControlMsg>) -> Window {
                     TimerMessage_Fire(td) => {
                         content_chan.send(Timer(copy td));
                     }
+                    TimerMessage_TriggerExit => content_chan.send(ExitMsg)
                 }
             }
         }
diff --git a/src/test/content/harness.js b/src/test/content/harness.js
new file mode 100644
index 00000000000..de2eec8bcf9
--- /dev/null
+++ b/src/test/content/harness.js
@@ -0,0 +1,16 @@
+function _fail(s) {
+  window.alert("TEST-UNEXPECTED-FAIL | " + s);
+}
+
+function _pass(s) {
+  window.alert("TEST-PASS | " + s);
+}
+
+function is(a, b) {
+  let f = a != b ? _fail : _pass;
+  f(a + " == " + b);
+}
+
+function finish() {
+  window.close();
+}
\ No newline at end of file
diff --git a/src/test/content/test_prototypes.html b/src/test/content/test_prototypes.html
new file mode 100644
index 00000000000..95d33713711
--- /dev/null
+++ b/src/test/content/test_prototypes.html
@@ -0,0 +1,8 @@
+<html>
+<head>
+  <script src="harness.js"></script>
+</head>
+<body>
+  <script src="test_prototypes.js"></script>
+</body>
+</html>
diff --git a/src/test/content/test_prototypes.js b/src/test/content/test_prototypes.js
new file mode 100644
index 00000000000..327843439f5
--- /dev/null
+++ b/src/test/content/test_prototypes.js
@@ -0,0 +1,7 @@
+is(HTMLImageElement instanceof HTMLElement, true);
+is(HTMLElement instanceof Element, true);
+is(Element instanceof Node, true);
+is(document instanceof Document, true);
+is(document.documentElement instanceof HTMLElement, true);
+is(document.documentElement instanceof Element, true);
+finish();
\ No newline at end of file
diff --git a/src/test/test_close.html b/src/test/test_close.html
new file mode 100644
index 00000000000..f4c8b185d0d
--- /dev/null
+++ b/src/test/test_close.html
@@ -0,0 +1,3 @@
+<html>
+<script src="test_close.js"></script>
+</html>
diff --git a/src/test/test_close.js b/src/test/test_close.js
new file mode 100644
index 00000000000..0f1640bab56
--- /dev/null
+++ b/src/test/test_close.js
@@ -0,0 +1 @@
+window.setTimeout(function() { window.close(); }, 3000);
\ No newline at end of file