diff --git a/google/cloud/monitoring_v3/services/metric_service/client.py b/google/cloud/monitoring_v3/services/metric_service/client.py
index 78b942d8..8a31011e 100644
--- a/google/cloud/monitoring_v3/services/metric_service/client.py
+++ b/google/cloud/monitoring_v3/services/metric_service/client.py
@@ -166,14 +166,14 @@ def transport(self) -> MetricServiceTransport:
         return self._transport
 
     '''@staticmethod
-    def metric_descriptor_path(project: str,) -> str:
+    def metric_descriptor_path(project: str,metric_descriptor: str,) -> str:
         """Returns a fully-qualified metric_descriptor string."""
-        return "projects/{project}/metricDescriptors/{metric_descriptor=**}".format(project=project, )
+        return "projects/{project}/metricDescriptors/{metric_descriptor=**}".format(project=project, metric_descriptor=metric_descriptor, )
 
     @staticmethod
     def parse_metric_descriptor_path(path: str) -> Dict[str,str]:
         """Parses a metric_descriptor path into its component segments."""
-        m = re.match(r"^projects/(?P<project>.+?)/metricDescriptors/{metric_descriptor=**}$", path)
+        m = re.match(r"^projects/(?P<project>.+?)/metricDescriptors/(?P<metric_descriptor>.+?)$", path)
         return m.groupdict() if m else {}'''
 
     @staticmethod
diff --git a/tests/unit/gapic/monitoring_v3/test_metric_service.py b/tests/unit/gapic/monitoring_v3/test_metric_service.py
index 6bdd95b0..744cd166 100644
--- a/tests/unit/gapic/monitoring_v3/test_metric_service.py
+++ b/tests/unit/gapic/monitoring_v3/test_metric_service.py
@@ -3548,14 +3548,16 @@ def test_metric_service_transport_channel_mtls_with_adc(transport_class):
 
 """def test_metric_descriptor_path():
     project = "squid"
-    expected = "projects/{project}/metricDescriptors/{metric_descriptor=**}".format(project=project, )
-    actual = MetricServiceClient.metric_descriptor_path(project)
+    metric_descriptor = "clam"
+    expected = "projects/{project}/metricDescriptors/{metric_descriptor=**}".format(project=project, metric_descriptor=metric_descriptor, )
+    actual = MetricServiceClient.metric_descriptor_path(project, metric_descriptor)
     assert expected == actual
 
 
 def test_parse_metric_descriptor_path():
     expected = {
-        "project": "clam",
+        "project": "whelk",
+        "metric_descriptor": "octopus",
     }
     path = MetricServiceClient.metric_descriptor_path(**expected)
 
@@ -3567,8 +3569,8 @@ def test_parse_metric_descriptor_path():
 
 
 def test_monitored_resource_descriptor_path():
-    project = "whelk"
-    monitored_resource_descriptor = "octopus"
+    project = "oyster"
+    monitored_resource_descriptor = "nudibranch"
     expected = "projects/{project}/monitoredResourceDescriptors/{monitored_resource_descriptor}".format(
         project=project, monitored_resource_descriptor=monitored_resource_descriptor,
     )
@@ -3580,8 +3582,8 @@ def test_monitored_resource_descriptor_path():
 
 def test_parse_monitored_resource_descriptor_path():
     expected = {
-        "project": "oyster",
-        "monitored_resource_descriptor": "nudibranch",
+        "project": "cuttlefish",
+        "monitored_resource_descriptor": "mussel",
     }
     path = MetricServiceClient.monitored_resource_descriptor_path(**expected)
 
@@ -3591,8 +3593,8 @@ def test_parse_monitored_resource_descriptor_path():
 
 
 def test_time_series_path():
-    project = "cuttlefish"
-    time_series = "mussel"
+    project = "winkle"
+    time_series = "nautilus"
     expected = "projects/{project}/timeSeries/{time_series}".format(
         project=project, time_series=time_series,
     )
@@ -3602,8 +3604,8 @@ def test_time_series_path():
 
 def test_parse_time_series_path():
     expected = {
-        "project": "winkle",
-        "time_series": "nautilus",
+        "project": "scallop",
+        "time_series": "abalone",
     }
     path = MetricServiceClient.time_series_path(**expected)
 
@@ -3613,7 +3615,7 @@ def test_parse_time_series_path():
 
 
 def test_common_billing_account_path():
-    billing_account = "scallop"
+    billing_account = "squid"
     expected = "billingAccounts/{billing_account}".format(
         billing_account=billing_account,
     )
@@ -3623,7 +3625,7 @@ def test_common_billing_account_path():
 
 def test_parse_common_billing_account_path():
     expected = {
-        "billing_account": "abalone",
+        "billing_account": "clam",
     }
     path = MetricServiceClient.common_billing_account_path(**expected)
 
@@ -3633,7 +3635,7 @@ def test_parse_common_billing_account_path():
 
 
 def test_common_folder_path():
-    folder = "squid"
+    folder = "whelk"
     expected = "folders/{folder}".format(folder=folder,)
     actual = MetricServiceClient.common_folder_path(folder)
     assert expected == actual
@@ -3641,7 +3643,7 @@ def test_common_folder_path():
 
 def test_parse_common_folder_path():
     expected = {
-        "folder": "clam",
+        "folder": "octopus",
     }
     path = MetricServiceClient.common_folder_path(**expected)
 
@@ -3651,7 +3653,7 @@ def test_parse_common_folder_path():
 
 
 def test_common_organization_path():
-    organization = "whelk"
+    organization = "oyster"
     expected = "organizations/{organization}".format(organization=organization,)
     actual = MetricServiceClient.common_organization_path(organization)
     assert expected == actual
@@ -3659,7 +3661,7 @@ def test_common_organization_path():
 
 def test_parse_common_organization_path():
     expected = {
-        "organization": "octopus",
+        "organization": "nudibranch",
     }
     path = MetricServiceClient.common_organization_path(**expected)
 
@@ -3669,7 +3671,7 @@ def test_parse_common_organization_path():
 
 
 def test_common_project_path():
-    project = "oyster"
+    project = "cuttlefish"
     expected = "projects/{project}".format(project=project,)
     actual = MetricServiceClient.common_project_path(project)
     assert expected == actual
@@ -3677,7 +3679,7 @@ def test_common_project_path():
 
 def test_parse_common_project_path():
     expected = {
-        "project": "nudibranch",
+        "project": "mussel",
     }
     path = MetricServiceClient.common_project_path(**expected)
 
@@ -3687,8 +3689,8 @@ def test_parse_common_project_path():
 
 
 def test_common_location_path():
-    project = "cuttlefish"
-    location = "mussel"
+    project = "winkle"
+    location = "nautilus"
     expected = "projects/{project}/locations/{location}".format(
         project=project, location=location,
     )
@@ -3698,8 +3700,8 @@ def test_common_location_path():
 
 def test_parse_common_location_path():
     expected = {
-        "project": "winkle",
-        "location": "nautilus",
+        "project": "scallop",
+        "location": "abalone",
     }
     path = MetricServiceClient.common_location_path(**expected)