diff --git a/moto/cloudwatch/models.py b/moto/cloudwatch/models.py
index 6b7587a9..d7f76daf 100644
--- a/moto/cloudwatch/models.py
+++ b/moto/cloudwatch/models.py
@@ -10,10 +10,12 @@ class Dimension(object):
 
 
 class FakeAlarm(object):
-    def __init__(self, name, comparison_operator, evaluation_periods, period,
-                 threshold, statistic, description, dimensions, alarm_actions,
+    def __init__(self, name, namespace, metric_name, comparison_operator, evaluation_periods,
+                 period, threshold, statistic, description, dimensions, alarm_actions,
                  ok_actions, insufficient_data_actions, unit):
         self.name = name
+        self.namespace = namespace
+        self.metric_name = metric_name
         self.comparison_operator = comparison_operator
         self.evaluation_periods = evaluation_periods
         self.period = period
@@ -43,10 +45,10 @@ class CloudWatchBackend(BaseBackend):
         self.alarms = {}
         self.metric_data = []
 
-    def put_metric_alarm(self, name, comparison_operator, evaluation_periods,
+    def put_metric_alarm(self, name, namespace, metric_name, comparison_operator, evaluation_periods,
                          period, threshold, statistic, description, dimensions,
                          alarm_actions, ok_actions, insufficient_data_actions, unit):
-        alarm = FakeAlarm(name, comparison_operator, evaluation_periods, period,
+        alarm = FakeAlarm(name, namespace, metric_name, comparison_operator, evaluation_periods, period,
                           threshold, statistic, description, dimensions, alarm_actions,
                           ok_actions, insufficient_data_actions, unit)
         self.alarms[name] = alarm
diff --git a/moto/cloudwatch/responses.py b/moto/cloudwatch/responses.py
index 5fd95bba..0d2cfacf 100644
--- a/moto/cloudwatch/responses.py
+++ b/moto/cloudwatch/responses.py
@@ -7,6 +7,8 @@ class CloudWatchResponse(BaseResponse):
 
     def put_metric_alarm(self):
         name = self._get_param('AlarmName')
+        namespace = self._get_param('Namespace')
+        metric_name = self._get_param('MetricName')
         comparison_operator = self._get_param('ComparisonOperator')
         evaluation_periods = self._get_param('EvaluationPeriods')
         period = self._get_param('Period')
@@ -19,7 +21,8 @@ class CloudWatchResponse(BaseResponse):
         insufficient_data_actions = self._get_multi_param("InsufficientDataActions.member")
         unit = self._get_param('Unit')
         cloudwatch_backend = cloudwatch_backends[self.region]
-        alarm = cloudwatch_backend.put_metric_alarm(name, comparison_operator,
+        alarm = cloudwatch_backend.put_metric_alarm(name, namespace, metric_name,
+                                                    comparison_operator,
                                                     evaluation_periods, period,
                                                     threshold, statistic,
                                                     description, dimensions,
diff --git a/setup.py b/setup.py
index f94df9dc..e079dbac 100644
--- a/setup.py
+++ b/setup.py
@@ -22,7 +22,7 @@ extras_require = {
 
 setup(
     name='moto',
-    version='0.4.25',
+    version='0.4.26',
     description='A library that allows your python tests to easily'
                 ' mock out the boto library',
     author='Steve Pulec',
diff --git a/tests/test_cloudwatch/test_cloudwatch.py b/tests/test_cloudwatch/test_cloudwatch.py
index 388871fd..7354241f 100644
--- a/tests/test_cloudwatch/test_cloudwatch.py
+++ b/tests/test_cloudwatch/test_cloudwatch.py
@@ -8,6 +8,8 @@ def alarm_fixture(name="tester", action=None):
     action = action or ['arn:alarm']
     return MetricAlarm(
         name=name,
+        namespace="{0}_namespace".format(name),
+        metric="{0}_metric".format(name),
         comparison='>=',
         threshold=2.0,
         period=60,
@@ -32,6 +34,8 @@ def test_create_alarm():
     alarms.should.have.length_of(1)
     alarm = alarms[0]
     alarm.name.should.equal('tester')
+    alarm.namespace.should.equal('tester_namespace')
+    alarm.metric.should.equal('tester_metric')
     alarm.comparison.should.equal('>=')
     alarm.threshold.should.equal(2.0)
     alarm.period.should.equal(60)