diff --git a/modules/Makefile.am b/modules/Makefile.am
index cba24e941..30a887064 100644
--- a/modules/Makefile.am
+++ b/modules/Makefile.am
@@ -51,6 +51,7 @@ moduledir=@moduledir@
 future_la_SOURCES = future.cc
 require_la_SOURCES = require.cc
 events_la_SOURCES = events.cc
+assert_la_SOURCES = assert.cc
 console_la_SOURCES = console.cc
 m_host_la_SOURCES = m_host.cc
 m_get_la_SOURCES = m_get.cc
@@ -141,6 +142,7 @@ m_get_la_SOURCES = m_get.cc
 module_LTLIBRARIES = \
 future.la            \
 require.la           \
+assert.la            \
 events.la            \
 console.la           \
 m_host.la            \
diff --git a/modules/assert.cc b/modules/assert.cc
new file mode 100644
index 000000000..6f6c74aee
--- /dev/null
+++ b/modules/assert.cc
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2016 Charybdis Development Team
+ * Copyright (C) 2016 Jason Volk <jason@zemos.net>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice is present in all copies.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <ircd/js/js.h>
+
+namespace ircd  {
+namespace js    {
+
+struct assert_
+:trap
+{
+	struct ok;
+
+	value on_call(object::handle, value::handle, const args &) override;
+	using trap::trap;
+}
+static assert_{"assert"};
+
+struct assert_::ok
+:trap::function
+{
+	value on_call(object::handle, value::handle, const args &) override;
+	using trap::function::function;
+}
+static ok{assert_, "ok"};
+
+value
+assert_::on_call(object::handle callee,
+                 value::handle thatv,
+                 const args &args)
+{
+	return call("ok", callee, args);
+}
+
+value
+assert_::ok::on_call(object::handle,
+                     value::handle val,
+                     const args &args)
+{
+	if(!bool(args[0]))
+	{
+		string message
+		{
+			args.has(1)? string(args[1]) : string("failed")
+		};
+
+		throw jserror("AssertionError: %s", message.c_str());
+	}
+
+	return {};
+}
+
+} // namespace js
+} // namespace ircd
+
+using namespace ircd;
+
+mapi::header IRCD_MODULE
+{
+	"Provides a set of assertion tests in the js environment",
+};