diff --git a/testing/src/test/resources/policy/protoextension_value_as_input/tests.textproto b/testing/src/test/resources/policy/protoextension_value_as_input/tests.textproto
new file mode 100644
index 000000000..455ac4bdc
--- /dev/null
+++ b/testing/src/test/resources/policy/protoextension_value_as_input/tests.textproto
@@ -0,0 +1,31 @@
+# proto-file: google3/third_party/cel/spec/proto/cel/expr/conformance/test/suite.proto
+# proto-message: cel.expr.conformance.test.TestSuite
+
+# The input binding is not used for evaluation, but rather to ensure
+# extension registry generation and support for `Any` typed inputs with
+# extensions.
+
+name: "protoextension_value_as_input"
+description: "Valid proto extension value as input"
+sections {
+  name: "valid"
+  description: "Valid proto extension value as input"
+  tests {
+    name: "value_extension_input"
+    input {
+      key: "spec"
+      value {
+        value {
+          object_value {
+            [type.googleapis.com/cel.expr.conformance.proto2.TestAllTypes] {
+              [cel.expr.conformance.proto2.Proto2ExtensionScopedMessage.message_scoped_nested_ext]: {}
+            }
+          }
+        }
+      }
+    }
+    output {
+      result_expr: "true"
+    }
+  }
+}
\ No newline at end of file