diff --git a/.kokoro/build.sh b/.kokoro/build.sh
index adc4be46..41a88d59 100755
--- a/.kokoro/build.sh
+++ b/.kokoro/build.sh
@@ -15,7 +15,11 @@
 
 set -eo pipefail
 
-cd github/python-api-core
+if [[ -z "${PROJECT_ROOT:-}" ]]; then
+    PROJECT_ROOT="github/python-api-core"
+fi
+
+cd "${PROJECT_ROOT}"
 
 # Disable buffering, so that the logs stream through.
 export PYTHONUNBUFFERED=1
@@ -30,16 +34,16 @@ export GOOGLE_APPLICATION_CREDENTIALS=${KOKORO_GFILE_DIR}/service-account.json
 export PROJECT_ID=$(cat "${KOKORO_GFILE_DIR}/project-id.json")
 
 # Remove old nox
-python3.6 -m pip uninstall --yes --quiet nox-automation
+python3 -m pip uninstall --yes --quiet nox-automation
 
 # Install nox
-python3.6 -m pip install --upgrade --quiet nox
-python3.6 -m nox --version
+python3 -m pip install --upgrade --quiet nox
+python3 -m nox --version
 
 # If NOX_SESSION is set, it only runs the specified session,
 # otherwise run all the sessions.
 if [[ -n "${NOX_SESSION:-}" ]]; then
-    python3.6 -m nox -s "${NOX_SESSION:-}"
+    python3 -m nox -s ${NOX_SESSION:-}
 else
-    python3.6 -m nox
+    python3 -m nox
 fi
diff --git a/.kokoro/docs/docs-presubmit.cfg b/.kokoro/docs/docs-presubmit.cfg
index 11181078..d1ed51eb 100644
--- a/.kokoro/docs/docs-presubmit.cfg
+++ b/.kokoro/docs/docs-presubmit.cfg
@@ -15,3 +15,14 @@ env_vars: {
     key: "TRAMPOLINE_IMAGE_UPLOAD"
     value: "false"
 }
+
+env_vars: {
+    key: "TRAMPOLINE_BUILD_FILE"
+    value: "github/python-api-core/.kokoro/build.sh"
+}
+
+# Only run this nox session.
+env_vars: {
+    key: "NOX_SESSION"
+    value: "docs docfx"
+}
diff --git a/.trampolinerc b/.trampolinerc
index 995ee291..383b6ec8 100644
--- a/.trampolinerc
+++ b/.trampolinerc
@@ -24,6 +24,7 @@ required_envvars+=(
 pass_down_envvars+=(
     "STAGING_BUCKET"
     "V2_STAGING_BUCKET"
+    "NOX_SESSION"
 )
 
 # Prevent unintentional override on the default image.
diff --git a/CHANGELOG.md b/CHANGELOG.md
index d7a70077..b4ff7fd3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,18 @@
 
 [1]: https://pypi.org/project/google-api-core/#history
 
+### [1.25.1](https://www.github.com/googleapis/python-api-core/compare/v1.25.0...v1.25.1) (2021-01-25)
+
+
+### Bug Fixes
+
+* add operation name to x-goog-request-params ([#133](https://www.github.com/googleapis/python-api-core/issues/133)) ([97cef4a](https://www.github.com/googleapis/python-api-core/commit/97cef4ad1db55938715f9ac8000d1b0ad1e71873))
+
+
+### Documentation
+
+* fix spelling errors in retry ([#131](https://www.github.com/googleapis/python-api-core/issues/131)) ([232dab0](https://www.github.com/googleapis/python-api-core/commit/232dab0ad3ef2cca0edfe707d8f90ca0ea200ba2))
+
 ## [1.25.0](https://www.github.com/googleapis/python-api-core/compare/v1.24.1...v1.25.0) (2021-01-14)
 
 
diff --git a/google/api_core/operations_v1/operations_client.py b/google/api_core/operations_v1/operations_client.py
index b8507964..b1218cfe 100644
--- a/google/api_core/operations_v1/operations_client.py
+++ b/google/api_core/operations_v1/operations_client.py
@@ -134,6 +134,11 @@ def get_operation(
                 subclass will be raised.
         """
         request = operations_pb2.GetOperationRequest(name=name)
+
+        # Add routing header
+        metadata = metadata or []
+        metadata.append(gapic_v1.routing_header.to_grpc_metadata({"name": name}))
+
         return self._get_operation(request, retry=retry, timeout=timeout, metadata=metadata)
 
     def list_operations(
@@ -196,6 +201,10 @@ def list_operations(
         # Create the request object.
         request = operations_pb2.ListOperationsRequest(name=name, filter=filter_)
 
+        # Add routing header
+        metadata = metadata or []
+        metadata.append(gapic_v1.routing_header.to_grpc_metadata({"name": name}))
+
         # Create the method used to fetch pages
         method = functools.partial(self._list_operations, retry=retry, timeout=timeout, metadata=metadata)
 
@@ -260,6 +269,11 @@ def cancel_operation(
         """
         # Create the request object.
         request = operations_pb2.CancelOperationRequest(name=name)
+
+        # Add routing header
+        metadata = metadata or []
+        metadata.append(gapic_v1.routing_header.to_grpc_metadata({"name": name}))
+
         self._cancel_operation(request, retry=retry, timeout=timeout, metadata=metadata)
 
     def delete_operation(
@@ -306,4 +320,9 @@ def delete_operation(
         """
         # Create the request object.
         request = operations_pb2.DeleteOperationRequest(name=name)
+
+        # Add routing header
+        metadata = metadata or []
+        metadata.append(gapic_v1.routing_header.to_grpc_metadata({"name": name}))
+
         self._delete_operation(request, retry=retry, timeout=timeout, metadata=metadata)
diff --git a/google/api_core/retry.py b/google/api_core/retry.py
index ea890628..592d34fa 100644
--- a/google/api_core/retry.py
+++ b/google/api_core/retry.py
@@ -230,9 +230,9 @@ class Retry(object):
     Args:
         predicate (Callable[Exception]): A callable that should return ``True``
             if the given exception is retryable.
-        initial (float): The minimum a,out of time to delay in seconds. This
+        initial (float): The minimum amount of time to delay in seconds. This
             must be greater than 0.
-        maximum (float): The maximum amout of time to delay in seconds.
+        maximum (float): The maximum amount of time to delay in seconds.
         multiplier (float): The multiplier applied to the delay.
         deadline (float): How long to keep retrying in seconds. The last sleep
             period is shortened as necessary, so that the last retry runs at
diff --git a/google/api_core/version.py b/google/api_core/version.py
index 327a56e2..5966ec4e 100644
--- a/google/api_core/version.py
+++ b/google/api_core/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "1.25.0"
+__version__ = "1.25.1"
diff --git a/synth.metadata b/synth.metadata
index 1e35d075..fd863114 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -4,14 +4,14 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/python-api-core.git",
-        "sha": "b51b7f587042fe9340371c1b5c8e9adf8001c43a"
+        "sha": "232dab0ad3ef2cca0edfe707d8f90ca0ea200ba2"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "41a4e56982620d3edcf110d76f4fcdfdec471ac8"
+        "sha": "ba960d730416fe05c50547e975ce79fcee52c671"
       }
     }
   ],
diff --git a/tests/unit/operations_v1/test_operations_client.py b/tests/unit/operations_v1/test_operations_client.py
index bd7f3736..ed19b7f3 100644
--- a/tests/unit/operations_v1/test_operations_client.py
+++ b/tests/unit/operations_v1/test_operations_client.py
@@ -24,9 +24,10 @@ def test_get_operation():
     client = operations_v1.OperationsClient(channel)
     channel.GetOperation.response = operations_pb2.Operation(name="meep")
 
-    response = client.get_operation("name", metadata=[("x-goog-request-params", "foo")])
+    response = client.get_operation("name", metadata=[("header", "foo")])
 
-    assert ("x-goog-request-params", "foo") in channel.GetOperation.calls[0].metadata
+    assert ("header", "foo") in channel.GetOperation.calls[0].metadata
+    assert ("x-goog-request-params", "name=name") in channel.GetOperation.calls[0].metadata
     assert len(channel.GetOperation.requests) == 1
     assert channel.GetOperation.requests[0].name == "name"
     assert response == channel.GetOperation.response
@@ -42,12 +43,13 @@ def test_list_operations():
     list_response = operations_pb2.ListOperationsResponse(operations=operations)
     channel.ListOperations.response = list_response
 
-    response = client.list_operations("name", "filter", metadata=[("x-goog-request-params", "foo")])
+    response = client.list_operations("name", "filter", metadata=[("header", "foo")])
 
     assert isinstance(response, page_iterator.Iterator)
     assert list(response) == operations
 
-    assert ("x-goog-request-params", "foo") in channel.ListOperations.calls[0].metadata
+    assert ("header", "foo") in channel.ListOperations.calls[0].metadata
+    assert ("x-goog-request-params", "name=name") in channel.ListOperations.calls[0].metadata
     assert len(channel.ListOperations.requests) == 1
     request = channel.ListOperations.requests[0]
     assert isinstance(request, operations_pb2.ListOperationsRequest)
@@ -60,9 +62,10 @@ def test_delete_operation():
     client = operations_v1.OperationsClient(channel)
     channel.DeleteOperation.response = empty_pb2.Empty()
 
-    client.delete_operation("name", metadata=[("x-goog-request-params", "foo")])
+    client.delete_operation("name", metadata=[("header", "foo")])
 
-    assert ("x-goog-request-params", "foo") in channel.DeleteOperation.calls[0].metadata
+    assert ("header", "foo") in channel.DeleteOperation.calls[0].metadata
+    assert ("x-goog-request-params", "name=name") in channel.DeleteOperation.calls[0].metadata
     assert len(channel.DeleteOperation.requests) == 1
     assert channel.DeleteOperation.requests[0].name == "name"
 
@@ -72,8 +75,9 @@ def test_cancel_operation():
     client = operations_v1.OperationsClient(channel)
     channel.CancelOperation.response = empty_pb2.Empty()
 
-    client.cancel_operation("name", metadata=[("x-goog-request-params", "foo")])
+    client.cancel_operation("name", metadata=[("header", "foo")])
 
-    assert ("x-goog-request-params", "foo") in channel.CancelOperation.calls[0].metadata
+    assert ("header", "foo") in channel.CancelOperation.calls[0].metadata
+    assert ("x-goog-request-params", "name=name") in channel.CancelOperation.calls[0].metadata
     assert len(channel.CancelOperation.requests) == 1
     assert channel.CancelOperation.requests[0].name == "name"