diff --git a/.kokoro-autosynth/python.cfg b/.kokoro-autosynth/python-shard0.cfg
similarity index 91%
rename from .kokoro-autosynth/python.cfg
rename to .kokoro-autosynth/python-shard0.cfg
index 10af7ea73..b161e5d7f 100644
--- a/.kokoro-autosynth/python.cfg
+++ b/.kokoro-autosynth/python-shard0.cfg
@@ -1,4 +1,4 @@
-# Copyright 2020 Google LLC
+# Copyright 2021 Google LLC
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -17,6 +17,11 @@ env_vars: {
     value: "autosynth.providers.python"
 }
 
+env_vars: {
+    key: "MULTISYNTH_SHARD"
+    value: "0/10"
+}
+
 env_vars: {
     key: "AUTOSYNTH_MULTIPLE_COMMITS"
     value: "true"
diff --git a/.kokoro-autosynth/python-shard1.cfg b/.kokoro-autosynth/python-shard1.cfg
new file mode 100644
index 000000000..657c2fb1f
--- /dev/null
+++ b/.kokoro-autosynth/python-shard1.cfg
@@ -0,0 +1,41 @@
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+env_vars: {
+    key: "MULTISYNTH_CONFIG"
+    value: "autosynth.providers.python"
+}
+
+env_vars: {
+    key: "MULTISYNTH_SHARD"
+    value: "1/10"
+}
+
+env_vars: {
+    key: "AUTOSYNTH_MULTIPLE_COMMITS"
+    value: "true"
+}
+
+env_vars: {
+    key: "AUTOSYNTH_MULTIPLE_PRS"
+    value: "true"
+}
+
+env_vars: {
+    key: "SYNTHTOOL_TRACK_OBSOLETE_FILES"
+    value: "true"
+}
+
+# bump the timeout for this job to 10 hours
+timeout_mins: 600
diff --git a/.kokoro-autosynth/python-shard2.cfg b/.kokoro-autosynth/python-shard2.cfg
new file mode 100644
index 000000000..5c3c149fd
--- /dev/null
+++ b/.kokoro-autosynth/python-shard2.cfg
@@ -0,0 +1,41 @@
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+env_vars: {
+    key: "MULTISYNTH_CONFIG"
+    value: "autosynth.providers.python"
+}
+
+env_vars: {
+    key: "MULTISYNTH_SHARD"
+    value: "2/10"
+}
+
+env_vars: {
+    key: "AUTOSYNTH_MULTIPLE_COMMITS"
+    value: "true"
+}
+
+env_vars: {
+    key: "AUTOSYNTH_MULTIPLE_PRS"
+    value: "true"
+}
+
+env_vars: {
+    key: "SYNTHTOOL_TRACK_OBSOLETE_FILES"
+    value: "true"
+}
+
+# bump the timeout for this job to 10 hours
+timeout_mins: 600
diff --git a/.kokoro-autosynth/python-shard3.cfg b/.kokoro-autosynth/python-shard3.cfg
new file mode 100644
index 000000000..a556c29f9
--- /dev/null
+++ b/.kokoro-autosynth/python-shard3.cfg
@@ -0,0 +1,41 @@
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+env_vars: {
+    key: "MULTISYNTH_CONFIG"
+    value: "autosynth.providers.python"
+}
+
+env_vars: {
+    key: "MULTISYNTH_SHARD"
+    value: "3/10"
+}
+
+env_vars: {
+    key: "AUTOSYNTH_MULTIPLE_COMMITS"
+    value: "true"
+}
+
+env_vars: {
+    key: "AUTOSYNTH_MULTIPLE_PRS"
+    value: "true"
+}
+
+env_vars: {
+    key: "SYNTHTOOL_TRACK_OBSOLETE_FILES"
+    value: "true"
+}
+
+# bump the timeout for this job to 10 hours
+timeout_mins: 600
diff --git a/.kokoro-autosynth/python-shard4.cfg b/.kokoro-autosynth/python-shard4.cfg
new file mode 100644
index 000000000..ac659a55b
--- /dev/null
+++ b/.kokoro-autosynth/python-shard4.cfg
@@ -0,0 +1,41 @@
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+env_vars: {
+    key: "MULTISYNTH_CONFIG"
+    value: "autosynth.providers.python"
+}
+
+env_vars: {
+    key: "MULTISYNTH_SHARD"
+    value: "4/10"
+}
+
+env_vars: {
+    key: "AUTOSYNTH_MULTIPLE_COMMITS"
+    value: "true"
+}
+
+env_vars: {
+    key: "AUTOSYNTH_MULTIPLE_PRS"
+    value: "true"
+}
+
+env_vars: {
+    key: "SYNTHTOOL_TRACK_OBSOLETE_FILES"
+    value: "true"
+}
+
+# bump the timeout for this job to 10 hours
+timeout_mins: 600
diff --git a/.kokoro-autosynth/python-shard5.cfg b/.kokoro-autosynth/python-shard5.cfg
new file mode 100644
index 000000000..01de4d66f
--- /dev/null
+++ b/.kokoro-autosynth/python-shard5.cfg
@@ -0,0 +1,41 @@
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+env_vars: {
+    key: "MULTISYNTH_CONFIG"
+    value: "autosynth.providers.python"
+}
+
+env_vars: {
+    key: "MULTISYNTH_SHARD"
+    value: "5/10"
+}
+
+env_vars: {
+    key: "AUTOSYNTH_MULTIPLE_COMMITS"
+    value: "true"
+}
+
+env_vars: {
+    key: "AUTOSYNTH_MULTIPLE_PRS"
+    value: "true"
+}
+
+env_vars: {
+    key: "SYNTHTOOL_TRACK_OBSOLETE_FILES"
+    value: "true"
+}
+
+# bump the timeout for this job to 10 hours
+timeout_mins: 600
diff --git a/.kokoro-autosynth/python-shard6.cfg b/.kokoro-autosynth/python-shard6.cfg
new file mode 100644
index 000000000..20663c53a
--- /dev/null
+++ b/.kokoro-autosynth/python-shard6.cfg
@@ -0,0 +1,41 @@
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+env_vars: {
+    key: "MULTISYNTH_CONFIG"
+    value: "autosynth.providers.python"
+}
+
+env_vars: {
+    key: "MULTISYNTH_SHARD"
+    value: "6/10"
+}
+
+env_vars: {
+    key: "AUTOSYNTH_MULTIPLE_COMMITS"
+    value: "true"
+}
+
+env_vars: {
+    key: "AUTOSYNTH_MULTIPLE_PRS"
+    value: "true"
+}
+
+env_vars: {
+    key: "SYNTHTOOL_TRACK_OBSOLETE_FILES"
+    value: "true"
+}
+
+# bump the timeout for this job to 10 hours
+timeout_mins: 600
diff --git a/.kokoro-autosynth/python-shard7.cfg b/.kokoro-autosynth/python-shard7.cfg
new file mode 100644
index 000000000..cfa82b7d1
--- /dev/null
+++ b/.kokoro-autosynth/python-shard7.cfg
@@ -0,0 +1,41 @@
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+env_vars: {
+    key: "MULTISYNTH_CONFIG"
+    value: "autosynth.providers.python"
+}
+
+env_vars: {
+    key: "MULTISYNTH_SHARD"
+    value: "7/10"
+}
+
+env_vars: {
+    key: "AUTOSYNTH_MULTIPLE_COMMITS"
+    value: "true"
+}
+
+env_vars: {
+    key: "AUTOSYNTH_MULTIPLE_PRS"
+    value: "true"
+}
+
+env_vars: {
+    key: "SYNTHTOOL_TRACK_OBSOLETE_FILES"
+    value: "true"
+}
+
+# bump the timeout for this job to 10 hours
+timeout_mins: 600
diff --git a/.kokoro-autosynth/python-shard8.cfg b/.kokoro-autosynth/python-shard8.cfg
new file mode 100644
index 000000000..2fa4251f2
--- /dev/null
+++ b/.kokoro-autosynth/python-shard8.cfg
@@ -0,0 +1,41 @@
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+env_vars: {
+    key: "MULTISYNTH_CONFIG"
+    value: "autosynth.providers.python"
+}
+
+env_vars: {
+    key: "MULTISYNTH_SHARD"
+    value: "8/10"
+}
+
+env_vars: {
+    key: "AUTOSYNTH_MULTIPLE_COMMITS"
+    value: "true"
+}
+
+env_vars: {
+    key: "AUTOSYNTH_MULTIPLE_PRS"
+    value: "true"
+}
+
+env_vars: {
+    key: "SYNTHTOOL_TRACK_OBSOLETE_FILES"
+    value: "true"
+}
+
+# bump the timeout for this job to 10 hours
+timeout_mins: 600
diff --git a/.kokoro-autosynth/python-shard9.cfg b/.kokoro-autosynth/python-shard9.cfg
new file mode 100644
index 000000000..d92183407
--- /dev/null
+++ b/.kokoro-autosynth/python-shard9.cfg
@@ -0,0 +1,41 @@
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+env_vars: {
+    key: "MULTISYNTH_CONFIG"
+    value: "autosynth.providers.python"
+}
+
+env_vars: {
+    key: "MULTISYNTH_SHARD"
+    value: "9/10"
+}
+
+env_vars: {
+    key: "AUTOSYNTH_MULTIPLE_COMMITS"
+    value: "true"
+}
+
+env_vars: {
+    key: "AUTOSYNTH_MULTIPLE_PRS"
+    value: "true"
+}
+
+env_vars: {
+    key: "SYNTHTOOL_TRACK_OBSOLETE_FILES"
+    value: "true"
+}
+
+# bump the timeout for this job to 10 hours
+timeout_mins: 600