diff --git a/src/config/cmdline.c b/src/config/cmdline.c
index a37e946f..5c4492d6 100644
--- a/src/config/cmdline.c
+++ b/src/config/cmdline.c
@@ -1009,6 +1009,10 @@ union option_info cmdline_options_info[] = {
 		N_("When enabled, terminfo ncurses functions will be used "
 		"instead of hardcoded sequences.")),
 
+	INIT_OPT_BOOL("", N_("Test js"),
+		"test", OPT_ZERO, 0,
+		N_("When enabled, helps to test js.")),
+
 	INIT_OPT_BOOL("", N_("Touch files in ~/.config/elinks when running with -no-connect/-session-ring"),
 		"touch-files", OPT_ZERO, 0,
 		N_("When enabled, runtime state files (bookmarks, history, "
diff --git a/src/ecmascript/ecmascript.c b/src/ecmascript/ecmascript.c
index 8c436f21..90f0f90c 100644
--- a/src/ecmascript/ecmascript.c
+++ b/src/ecmascript/ecmascript.c
@@ -643,7 +643,7 @@ init_ecmascript_module(struct module *module)
 	if (xdg_config_home) {
 		/* ecmascript console log */
 		console_log_filename = straconcat(xdg_config_home, "/console.log", NULL);
-		console_error_filename = straconcat(xdg_config_home, "/console.err", NULL);
+		console_error_filename = get_cmd_opt_bool("test") ? stracpy("/dev/stderr") : straconcat(xdg_config_home, "/console.err", NULL);
 		/* ecmascript local storage db location */
 #ifdef CONFIG_OS_DOS
 		local_storage_filename = stracpy("elinks_ls.db");
diff --git a/src/ecmascript/spidermonkey/console.cpp b/src/ecmascript/spidermonkey/console.cpp
index 8d0e0e5c..51321d9b 100644
--- a/src/ecmascript/spidermonkey/console.cpp
+++ b/src/ecmascript/spidermonkey/console.cpp
@@ -20,6 +20,7 @@
 #include "ecmascript/ecmascript.h"
 #include "ecmascript/spidermonkey/console.h"
 #include "intl/libintl.h"
+#include "main/main.h"
 #include "osdep/newwin.h"
 #include "osdep/sysname.h"
 #include "util/conv.h"
@@ -55,12 +56,14 @@ const JSClass console_class = {
 
 static bool console_assert(JSContext *ctx, unsigned int argc, JS::Value *vp);
 static bool console_error(JSContext *ctx, unsigned int argc, JS::Value *vp);
+static bool console_exit(JSContext *ctx, unsigned int argc, JS::Value *vp);
 static bool console_log(JSContext *ctx, unsigned int argc, JS::Value *vp);
 
 const spidermonkeyFunctionSpec console_funcs[] = {
 	{ "assert",		console_assert,		2 },
 	{ "log",		console_log,	 	1 },
 	{ "error",		console_error,	 	1 },
+	{ "exit",		console_exit,	 	1 },
 	{ NULL }
 };
 
@@ -145,3 +148,20 @@ console_error(JSContext *ctx, unsigned int argc, JS::Value *vp)
 #endif
 	return console_log_common(ctx, argc, vp, console_error_filename);
 }
+
+static bool
+console_exit(JSContext *ctx, unsigned int argc, JS::Value *vp)
+{
+#ifdef ECMASCRIPT_DEBUG
+	fprintf(stderr, "%s:%s\n", __FILE__, __FUNCTION__);
+#endif
+	JS::CallArgs args = CallArgsFromVp(argc, vp);
+	args.rval().setUndefined();
+
+	if (!get_cmd_opt_bool("test")) {
+		return true;
+	}
+	program.retval = args[0].toBoolean() ? RET_ERROR : RET_OK;
+	program.terminate = 1;
+	return true;
+}
diff --git a/src/osdep/osdep.c b/src/osdep/osdep.c
index 172d7341..4f5948ec 100644
--- a/src/osdep/osdep.c
+++ b/src/osdep/osdep.c
@@ -875,6 +875,10 @@ done_draw(void)
 int
 get_output_handle(void)
 {
+	if (get_cmd_opt_bool("test")) {
+		return open("/dev/null", O_WRONLY);
+	}
+
 	return 1;
 }
 
diff --git a/test/ecmascript/console.assert.html b/test/ecmascript/console.assert.html
index 5750944a..6cc00b38 100644
--- a/test/ecmascript/console.assert.html
+++ b/test/ecmascript/console.assert.html
@@ -1,4 +1,5 @@
 <script>
 console.assert(0 % 2 === 0, "O is not even");
 console.assert(1 % 2 === 0, "1 is not even");
+console.exit(0);
 </script>