diff --git a/moto/swf/models.py b/moto/swf/models.py
index c1aaff1d2..db1ca94fb 100644
--- a/moto/swf/models.py
+++ b/moto/swf/models.py
@@ -45,10 +45,14 @@ class SWFBackend(BaseBackend):
         if not isinstance(parameter, basestring):
             raise SWFSerializationException()
 
-    def list_domains(self, status):
+    def list_domains(self, status, reverse_order=None):
         self._check_string(status)
-        return [domain for domain in self.domains
-                if domain.status == status]
+        domains = [domain for domain in self.domains
+                   if domain.status == status]
+        domains = sorted(domains, key=lambda domain: domain.name)
+        if reverse_order:
+            domains = reversed(domains)
+        return domains
 
     def register_domain(self, name, workflow_execution_retention_period_in_days,
                         description=None):
diff --git a/moto/swf/responses.py b/moto/swf/responses.py
index 57cebd7b6..8e2dae712 100644
--- a/moto/swf/responses.py
+++ b/moto/swf/responses.py
@@ -51,11 +51,11 @@ class SWFResponse(BaseResponse):
     def _params(self):
         return json.loads(self.body)
 
-    # TODO: implement "reverseOrder" option
     # TODO: implement pagination
     def list_domains(self):
         status = self._params.get("registrationStatus")
-        domains = self.swf_backend.list_domains(status)
+        reverse_order = self._params.get("reverseOrder", None)
+        domains = self.swf_backend.list_domains(status, reverse_order=reverse_order)
         template = self.response_template(LIST_DOMAINS_TEMPLATE)
         return template.render(domains=domains)
 
diff --git a/tests/test_swf/test_domains.py b/tests/test_swf/test_domains.py
index 1a43e4cd0..7ab3dddc3 100644
--- a/tests/test_swf/test_domains.py
+++ b/tests/test_swf/test_domains.py
@@ -12,7 +12,6 @@ from moto.swf.exceptions import (
 
 
 # RegisterDomain endpoint
-# ListDomain endpoint
 @mock_swf
 def test_register_domain():
     conn = boto.connect_swf("the_key", "the_secret")
@@ -57,6 +56,30 @@ def test_register_with_wrong_parameter_type():
     })
 
 
+# ListDomain endpoint
+@mock_swf
+def test_list_domains_order():
+    conn = boto.connect_swf("the_key", "the_secret")
+    conn.register_domain("b-test-domain", "60")
+    conn.register_domain("a-test-domain", "60")
+    conn.register_domain("c-test-domain", "60")
+
+    all_domains = conn.list_domains("REGISTERED")
+    names = [domain["name"] for domain in all_domains["domainInfos"]]
+    names.should.equal(["a-test-domain", "b-test-domain", "c-test-domain"])
+
+@mock_swf
+def test_list_domains_reverse_order():
+    conn = boto.connect_swf("the_key", "the_secret")
+    conn.register_domain("b-test-domain", "60")
+    conn.register_domain("a-test-domain", "60")
+    conn.register_domain("c-test-domain", "60")
+
+    all_domains = conn.list_domains("REGISTERED", reverse_order=True)
+    names = [domain["name"] for domain in all_domains["domainInfos"]]
+    names.should.equal(["c-test-domain", "b-test-domain", "a-test-domain"])
+
+
 # DeprecateDomain endpoint
 @mock_swf
 def test_deprecate_domain():