diff --git a/java-errorreporting/.github/.OwlBot.lock.yaml b/java-errorreporting/.github/.OwlBot.lock.yaml
index 459487d38827..7353307aa626 100644
--- a/java-errorreporting/.github/.OwlBot.lock.yaml
+++ b/java-errorreporting/.github/.OwlBot.lock.yaml
@@ -13,4 +13,5 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-java:latest
-  digest: sha256:ae72564aa9c368b9ccd96f4af21f87889fd83b9e60635b80844deb5a2ccd08aa
+  digest: sha256:264c6d5da60ff1684fbdd2b268d6a3ffca2038246e0948a06f15ca0c3cf28ce8
+
diff --git a/java-errorreporting/.kokoro/dependencies.sh b/java-errorreporting/.kokoro/dependencies.sh
index bd8960246f66..d7476cfe9727 100755
--- a/java-errorreporting/.kokoro/dependencies.sh
+++ b/java-errorreporting/.kokoro/dependencies.sh
@@ -57,3 +57,54 @@ retry_with_backoff 3 10 \
     -Dclirr.skip=true
 
 mvn -B dependency:analyze -DfailOnWarning=true
+
+echo "****************** DEPENDENCY LIST COMPLETENESS CHECK *******************"
+## Run dependency list completeness check
+function completenessCheck() {
+  # Output dep list with compile scope generated using the original pom
+  # Running mvn dependency:list on Java versions that support modules will also include the module of the dependency.
+  # This is stripped from the output as it is not present in the flattened pom.
+  # Only dependencies with 'compile' or 'runtime' scope are included from original dependency list.
+  msg "Generating dependency list using original pom..."
+  mvn dependency:list -f pom.xml -DincludeScope=runtime -Dsort=true | grep '\[INFO]    .*:.*:.*:.*:.*' | sed -e 's/ --.*//' >.org-list.txt
+
+  # Output dep list generated using the flattened pom (only 'compile' and 'runtime' scopes)
+  msg "Generating dependency list using flattened pom..."
+  mvn dependency:list -f .flattened-pom.xml -DincludeScope=runtime -Dsort=true | grep '\[INFO]    .*:.*:.*:.*:.*' >.new-list.txt
+
+  # Compare two dependency lists
+  msg "Comparing dependency lists..."
+  diff .org-list.txt .new-list.txt >.diff.txt
+  if [[ $? == 0 ]]
+    then
+      msg "Success. No diff!"
+  else
+    msg "Diff found. See below: "
+    msg "You can also check .diff.txt file located in $1."
+    cat .diff.txt
+    return 1
+  fi
+}
+
+# Allow failures to continue running the script
+set +e
+
+error_count=0
+for path in **/.flattened-pom.xml
+do
+  # Check flattened pom in each dir that contains it for completeness
+  dir=$(dirname "$path")
+  pushd "$dir"
+  completenessCheck "$dir"
+  error_count=$(($error_count + $?))
+  popd
+done
+
+if [[ $error_count == 0 ]]
+then
+  msg "All checks passed."
+  exit 0
+else
+  msg "Errors found. See log statements above."
+  exit 1
+fi