diff --git a/.github/workflows/sdk-platform-java-sonar.yaml b/.github/workflows/sdk-platform-java-sonar.yaml
index bbe558e168b4..12abcd3c452c 100644
--- a/.github/workflows/sdk-platform-java-sonar.yaml
+++ b/.github/workflows/sdk-platform-java-sonar.yaml
@@ -20,6 +20,7 @@ jobs:
         filters: |
           library:
             - 'sdk-platform-java/**'
+            - '.github/workflows/sdk-platform-java-sonar.yaml'
   build:
     needs: filter
     if: needs.filter.outputs.library == 'true' && (github.event.pull_request.head.repo.full_name == github.repository || github.event_name != 'pull_request')
@@ -46,13 +47,17 @@ jobs:
           path: ~/.m2
           key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
           restore-keys: ${{ runner.os }}-m2
-      - name: Install modules to local maven
-        run: |
-          mvn install -T 1C -DskipTests -ntp -B
-          cd java-showcase
-          mvn install -T 1C -DskipTests -ntp -B
+      - name: Install all modules first
+        shell: bash
+        run: .kokoro/build.sh
+        env:
+          BUILD_SUBDIR: sdk-platform-java
+          JOB_TYPE: install
+      - name: Install showcase to local maven
+        run: mvn install -T 1C -DskipTests -ntp -B
+        working-directory: sdk-platform-java/java-showcase
       - name: Parse showcase version
-        working-directory: java-showcase/gapic-showcase
+        working-directory: sdk-platform-java/java-showcase/gapic-showcase
         run: echo "SHOWCASE_VERSION=$(mvn help:evaluate -Dexpression=gapic-showcase.version -q -DforceStdout)" >> "$GITHUB_ENV"
       - name: Install showcase server
         run: |
@@ -79,6 +84,7 @@ jobs:
               -Dsonar.projectKey=googleapis_gapic-generator-java \
               -Dsonar.organization=googleapis \
               -Dsonar.host.url=https://sonarcloud.io
+        working-directory: sdk-platform-java
       - name: Build and analyze Showcase Integration Tests Coverage
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}  # Needed to get PR information, if any
@@ -93,3 +99,4 @@ jobs:
               -Dsonar.organization=googleapis \
               -Dsonar.host.url=https://sonarcloud.io \
               -Dsonar.projectName=java_showcase_integration_tests
+        working-directory: sdk-platform-java
diff --git a/.kokoro/common.sh b/.kokoro/common.sh
index 9fe966173726..e20f7e9fbe80 100644
--- a/.kokoro/common.sh
+++ b/.kokoro/common.sh
@@ -422,6 +422,16 @@ function install_modules() {
       'sdk-platform-java/java-shared-dependencies/first-party-dependencies'
       'sdk-platform-java/java-shared-dependencies/third-party-dependencies'
       'sdk-platform-java/gapic-generator-java-bom'
+      'sdk-platform-java/java-iam/grpc-google-iam-v1'
+      'sdk-platform-java/java-iam/grpc-google-iam-v2'
+      'sdk-platform-java/java-iam/grpc-google-iam-v2beta'
+      'sdk-platform-java/java-iam/grpc-google-iam-v3'
+      'sdk-platform-java/java-iam/grpc-google-iam-v3beta'
+      'sdk-platform-java/java-iam/proto-google-iam-v1'
+      'sdk-platform-java/java-iam/proto-google-iam-v2'
+      'sdk-platform-java/java-iam/proto-google-iam-v2beta'
+      'sdk-platform-java/java-iam/proto-google-iam-v3'
+      'sdk-platform-java/java-iam/proto-google-iam-v3beta'
       'sdk-platform-java/java-core/google-cloud-core-bom'
       'sdk-platform-java/java-core/google-cloud-core'
       'sdk-platform-java/java-core/google-cloud-core-grpc'