diff --git a/grpc-google-cloud-spanner-admin-instance-v1/clirr-ignored-differences.xml b/grpc-google-cloud-spanner-admin-instance-v1/clirr-ignored-differences.xml
new file mode 100644
index 00000000000..e4d9658950a
--- /dev/null
+++ b/grpc-google-cloud-spanner-admin-instance-v1/clirr-ignored-differences.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- see http://www.mojohaus.org/clirr-maven-plugin/examples/ignored-differences.html -->
+<differences>
+  <difference>
+    <differenceType>7012</differenceType>
+    <className>com/google/spanner/admin/instance/v1/InstanceAdminGrpc$AsyncService</className>
+    <method>*InstancePartition*(*)</method>
+  </difference>
+</differences>
diff --git a/proto-google-cloud-spanner-executor-v1/pom.xml b/proto-google-cloud-spanner-executor-v1/pom.xml
index d4d14f6d1ac..9be1f299b06 100644
--- a/proto-google-cloud-spanner-executor-v1/pom.xml
+++ b/proto-google-cloud-spanner-executor-v1/pom.xml
@@ -65,6 +65,14 @@
           <groupId>org.codehaus.mojo</groupId>
           <artifactId>flatten-maven-plugin</artifactId>
         </plugin>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>clirr-maven-plugin</artifactId>
+        <configuration>
+          <!-- Exclude (public) classes in this internal package -->
+          <excludes>com/google/spanner/executor/v1/**</excludes>
+        </configuration>
+      </plugin>
     </plugins>
   </build>
 </project>