diff --git a/testing/src/test/resources/policy/custom_variable_bindings/config.yaml b/testing/src/test/resources/policy/custom_variable_bindings/config.yaml
new file mode 100644
index 000000000..83b3685c3
--- /dev/null
+++ b/testing/src/test/resources/policy/custom_variable_bindings/config.yaml
@@ -0,0 +1,22 @@
+# Copyright 2025 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
+#
+#    https://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.
+
+name: "custom_variable_bindings"
+container: "cel.expr.conformance.proto2"
+variables:
+  - name: "spec"
+    type:
+      type_name: "cel.expr.conformance.proto2.TestAllTypes"
+extensions:
+- name: "protos"
\ No newline at end of file
diff --git a/testing/src/test/resources/policy/custom_variable_bindings/policy.yaml b/testing/src/test/resources/policy/custom_variable_bindings/policy.yaml
new file mode 100644
index 000000000..7a94eebd2
--- /dev/null
+++ b/testing/src/test/resources/policy/custom_variable_bindings/policy.yaml
@@ -0,0 +1,20 @@
+# Copyright 2025 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
+#
+#    https://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.
+
+name: "custom_variable_bindings"
+rule:
+  match:
+  - condition: proto.getExt(spec, cel.expr.conformance.proto2.int32_ext) > 0
+    output: "true"
+  - output: "false"
\ No newline at end of file
diff --git a/testing/src/test/resources/policy/custom_variable_bindings/tests.yaml b/testing/src/test/resources/policy/custom_variable_bindings/tests.yaml
new file mode 100644
index 000000000..dac470503
--- /dev/null
+++ b/testing/src/test/resources/policy/custom_variable_bindings/tests.yaml
@@ -0,0 +1,22 @@
+# Copyright 2025 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
+#
+#    https://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.
+
+description: "Tests for custom variable bindings."
+section:
+  - name: "custom_variable_bindings"
+    tests:
+    - name: "true_by_default"
+      # The input for this test is configured programmatically in the test
+      # class with a value of 1 (see CustomVariableBindingsUserTest.java).
+      output: "true"
\ No newline at end of file