diff --git a/.github/workflows/sdk-platform-java-sonar.yaml b/.github/workflows/sdk-platform-java-sonar.yaml
index 24133d69110d..985a391881f5 100644
--- a/.github/workflows/sdk-platform-java-sonar.yaml
+++ b/.github/workflows/sdk-platform-java-sonar.yaml
@@ -46,13 +46,18 @@ jobs:
           path: ~/.m2
           key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
           restore-keys: ${{ runner.os }}-m2
-      - name: Install modules to local maven
-        run: |
-          mvn install -T 1C -DskipTests -ntp -B
-          cd java-showcase
-          mvn install -T 1C -DskipTests -ntp -B
+      - name: Install sdk-platform-modules
+        shell: bash
+        run: .kokoro/build.sh
+        env:
+          BUILD_SUBDIR: sdk-platform-java
+          JOB_TYPE: install
+      - name: Install java-showcase
+        shell: bash
+        run: mvn install -T 1C -DskipTests -ntp -B
+        working-directory: sdk-platform-java/java-showcase
       - name: Parse showcase version
-        working-directory: java-showcase/gapic-showcase
+        working-directory: sdk-platform-java/java-showcase/gapic-showcase
         run: echo "SHOWCASE_VERSION=$(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/sdk-platform-java/GEMINI.md b/sdk-platform-java/GEMINI.md
index aed84e060b35..df090820aaa3 100644
--- a/sdk-platform-java/GEMINI.md
+++ b/sdk-platform-java/GEMINI.md
@@ -154,4 +154,4 @@ Showcase integration tests are run against a local server that implements the Sh
 - **Issues:** All significant changes should start with a GitHub issue.
 - **Pull Requests:** All code changes must be submitted via a pull request and require review. Before creating a PR, always pull latest from main, merge main to local branch and resolve any conflicts.  
 - **Testing:** All new logic should be accompanied by tests.
-- For more details, see `CONTRIBUTING.md`.
\ No newline at end of file
+- For more details, see `CONTRIBUTING.md`.
diff --git a/sdk-platform-java/dependencies.txt b/sdk-platform-java/dependencies.txt
index be11b4a2d350..afdb572539e8 100644
--- a/sdk-platform-java/dependencies.txt
+++ b/sdk-platform-java/dependencies.txt
@@ -10,7 +10,6 @@
 # These dependencies are declared: https://github.com/googleapis/sdk-platform-java/blob/main/gapic-generator-java-pom-parent/pom.xml
 javax.annotation:javax.annotation-api,javax.annotation-api=1.3.2
 io.grpc:grpc-bom,grpc=1.80.0
-com.google.auth:google-auth-library-bom,google.auth=1.46.0
 com.google.http-client:google-http-client,google.http-client=2.1.0
 com.google.code.gson:gson,gson=2.13.2
 com.google.guava:guava,guava=33.5.0-jre
diff --git a/sdk-platform-java/gax-java/gax/src/test/java/com/google/api/gax/logging/Slf4jUtilsTest.java b/sdk-platform-java/gax-java/gax/src/test/java/com/google/api/gax/logging/Slf4jUtilsTest.java
index b40ca1bc2c9c..b2b0f21dc791 100644
--- a/sdk-platform-java/gax-java/gax/src/test/java/com/google/api/gax/logging/Slf4jUtilsTest.java
+++ b/sdk-platform-java/gax-java/gax/src/test/java/com/google/api/gax/logging/Slf4jUtilsTest.java
@@ -46,6 +46,7 @@
 import com.google.protobuf.Option;
 import java.util.HashMap;
 import java.util.Map;
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.mockito.Mockito;
 import org.slf4j.Logger;
@@ -56,6 +57,7 @@ class Slf4jUtilsTest {
 
   // This test should only run GOOGLE_SDK_JAVA_LOGGING != true
   @Test
+  @Disabled("See https://github.com/googleapis/google-cloud-java/issues/12828")
   void testGetLogger_loggingDisabled_shouldGetNOPLogger() {
     Logger logger = Slf4jUtils.getLogger(Slf4jUtilsTest.class);
     assertEquals(NOPLogger.class, logger.getClass());
diff --git a/settings.xml b/settings.xml
index 8b592f625d58..3af27a94af88 100644
--- a/settings.xml
+++ b/settings.xml
@@ -18,15 +18,7 @@
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
                           https://maven.apache.org/xsd/settings-1.0.0.xsd">
-  <mirrors>
-    <mirror>
-      <!-- Google's Maven Central mirror for Americas
-       https://maven-central.storage.googleapis.com/index.html
-      -->
-      <id>google-maven-central</id>
-      <name>GCS Maven Central mirror</name>
-      <url>https://maven-central.storage-download.googleapis.com/maven2/</url>
-      <mirrorOf>central</mirrorOf>
-    </mirror>
-  </mirrors>
+  <!-- This file contains settings used by .kokoro/build.sh. These are global
+   configs used by almost every build script.
+  -->
 </settings>