diff --git a/google-api-client-apache-v5/src/main/java/com/google/api/client/googleapis/apache/v5/GoogleApache5HttpTransport.java b/google-api-client-apache-v5/src/main/java/com/google/api/client/googleapis/apache/v5/GoogleApache5HttpTransport.java
index 00a7673b3..f056024eb 100644
--- a/google-api-client-apache-v5/src/main/java/com/google/api/client/googleapis/apache/v5/GoogleApache5HttpTransport.java
+++ b/google-api-client-apache-v5/src/main/java/com/google/api/client/googleapis/apache/v5/GoogleApache5HttpTransport.java
@@ -14,10 +14,8 @@
 
 package com.google.api.client.googleapis.apache.v5;
 
-import com.google.api.client.googleapis.GoogleUtils;
 import com.google.api.client.googleapis.mtls.MtlsProvider;
 import com.google.api.client.googleapis.mtls.MtlsUtils;
-import com.google.api.client.googleapis.util.Utils;
 import com.google.api.client.http.apache.v5.Apache5HttpTransport;
 import com.google.api.client.util.SslUtils;
 import com.google.common.annotations.Beta;
@@ -48,11 +46,11 @@
 public final class GoogleApache5HttpTransport {
 
   /**
-   * Returns a new instance of {@link Apache5HttpTransport} that uses {@link
-   * GoogleUtils#getCertificateTrustStore()} for the trusted certificates. If
-   * `GOOGLE_API_USE_CLIENT_CERTIFICATE` environment variable is set to "true", and the default
-   * client certificate key store from {@link Utils#loadDefaultMtlsKeyStore()} is not null, then the
-   * transport uses the default client certificate and is mutual TLS.
+   * Returns a new instance of {@link Apache5HttpTransport} that uses default jdk certificates for
+   * the trusted certificates. If `GOOGLE_API_USE_CLIENT_CERTIFICATE` environment variable is set to
+   * "true", and the default client certificate key store from {@link
+   * Utils#loadDefaultMtlsKeyStore()} is not null, then the transport uses the default client
+   * certificate and is mutual TLS.
    */
   public static Apache5HttpTransport newTrustedTransport()
       throws GeneralSecurityException, IOException {
@@ -61,9 +59,8 @@ public static Apache5HttpTransport newTrustedTransport()
 
   /**
    * {@link Beta} <br>
-   * Returns a new instance of {@link Apache5HttpTransport} that uses {@link
-   * GoogleUtils#getCertificateTrustStore()} for the trusted certificates. mtlsProvider can be used
-   * to configure mutual TLS for the transport.
+   * Returns a new instance of {@link Apache5HttpTransport} that uses default jdk certificates for
+   * the trusted certificates. mtlsProvider can be used to configure mutual TLS for the transport.
    *
    * @param mtlsProvider MtlsProvider to configure mutual TLS for the transport
    */
@@ -109,22 +106,20 @@ public SocketFactoryRegistryHandler(MtlsProvider mtlsProvider)
         mtlsKeyStorePassword = mtlsProvider.getKeyStorePassword();
       }
 
-      // Use the included trust store
-      KeyStore trustStore = GoogleUtils.getCertificateTrustStore();
       SSLContext sslContext = SslUtils.getTlsSslContext();
 
       if (mtlsKeyStore != null && mtlsKeyStorePassword != null) {
         this.isMtls = true;
         SslUtils.initSslContext(
             sslContext,
-            trustStore,
+            null,
             SslUtils.getPkixTrustManagerFactory(),
             mtlsKeyStore,
             mtlsKeyStorePassword,
             SslUtils.getDefaultKeyManagerFactory());
       } else {
         this.isMtls = false;
-        SslUtils.initSslContext(sslContext, trustStore, SslUtils.getPkixTrustManagerFactory());
+        SslUtils.initSslContext(sslContext, null, SslUtils.getPkixTrustManagerFactory());
       }
       LayeredConnectionSocketFactory socketFactory = new SSLConnectionSocketFactory(sslContext);
 
diff --git a/google-api-client-apache-v5/src/test/java/com/google/api/client/googleapis/apache/v5/ITGoogleApache5HttpTransportTest.java b/google-api-client-apache-v5/src/test/java/com/google/api/client/googleapis/apache/v5/ITGoogleApache5HttpTransportTest.java
index f8e9cbed1..8398606d3 100644
--- a/google-api-client-apache-v5/src/test/java/com/google/api/client/googleapis/apache/v5/ITGoogleApache5HttpTransportTest.java
+++ b/google-api-client-apache-v5/src/test/java/com/google/api/client/googleapis/apache/v5/ITGoogleApache5HttpTransportTest.java
@@ -30,10 +30,11 @@
 public class ITGoogleApache5HttpTransportTest {
 
   @Test
-  public void testHttpRequestFailsWhenMakingRequestToSiteWithoutGoogleCerts()
+  public void testHttpRequestFailsWhenMakingRequestToSiteWithoutDefaultJdkCerts()
       throws GeneralSecurityException, IOException {
     Apache5HttpTransport apache5HttpTransport = GoogleApache5HttpTransport.newTrustedTransport();
-    HttpGet httpGet = new HttpGet("https://maven.com/");
+    // Use a self-signed certificate site that won't be trusted by default trust store
+    HttpGet httpGet = new HttpGet("https://self-signed.badssl.com/");
     Exception exception = null;
     try {
       apache5HttpTransport
@@ -43,7 +44,7 @@ public void testHttpRequestFailsWhenMakingRequestToSiteWithoutGoogleCerts()
               new HttpClientResponseHandler<Void>() {
                 @Override
                 public Void handleResponse(ClassicHttpResponse response) {
-                  fail("Should not have been able to complete SSL request on non google site.");
+                  fail("Should not have been able to complete SSL request with untrusted cert.");
                   return null;
                 }
               });
@@ -73,4 +74,23 @@ public Void handleResponse(ClassicHttpResponse response) {
               }
             });
   }
+
+  @Test
+  public void testHttpRequestPassesWhenMakingRequestToSiteContainedInDefaultCerts()
+      throws Exception {
+    Apache5HttpTransport apache5HttpTransport = GoogleApache5HttpTransport.newTrustedTransport();
+    HttpGet httpGet = new HttpGet("https://central.sonatype.com/");
+
+    apache5HttpTransport
+        .getHttpClient()
+        .execute(
+            httpGet,
+            new HttpClientResponseHandler<Void>() {
+              @Override
+              public Void handleResponse(ClassicHttpResponse response) {
+                assertEquals(200, response.getCode());
+                return null;
+              }
+            });
+  }
 }
diff --git a/google-api-client/src/main/java/com/google/api/client/googleapis/apache/v2/GoogleApacheHttpTransport.java b/google-api-client/src/main/java/com/google/api/client/googleapis/apache/v2/GoogleApacheHttpTransport.java
index 93347cd3e..11c8dbbf3 100644
--- a/google-api-client/src/main/java/com/google/api/client/googleapis/apache/v2/GoogleApacheHttpTransport.java
+++ b/google-api-client/src/main/java/com/google/api/client/googleapis/apache/v2/GoogleApacheHttpTransport.java
@@ -14,10 +14,8 @@
 
 package com.google.api.client.googleapis.apache.v2;
 
-import com.google.api.client.googleapis.GoogleUtils;
 import com.google.api.client.googleapis.mtls.MtlsProvider;
 import com.google.api.client.googleapis.mtls.MtlsUtils;
-import com.google.api.client.googleapis.util.Utils;
 import com.google.api.client.http.apache.v2.ApacheHttpTransport;
 import com.google.api.client.util.Beta;
 import com.google.api.client.util.SslUtils;
@@ -47,11 +45,11 @@
 public final class GoogleApacheHttpTransport {
 
   /**
-   * Returns a new instance of {@link ApacheHttpTransport} that uses {@link
-   * GoogleUtils#getCertificateTrustStore()} for the trusted certificates. If
-   * `GOOGLE_API_USE_CLIENT_CERTIFICATE` environment variable is set to "true", and the default
-   * client certificate key store from {@link Utils#loadDefaultMtlsKeyStore()} is not null, then the
-   * transport uses the default client certificate and is mutual TLS.
+   * Returns a new instance of {@link ApacheHttpTransport} that uses default jdk certificates for
+   * the trusted certificates. If `GOOGLE_API_USE_CLIENT_CERTIFICATE` environment variable is set to
+   * "true", and the default client certificate key store from {@link
+   * Utils#loadDefaultMtlsKeyStore()} is not null, then the transport uses the default client
+   * certificate and is mutual TLS.
    */
   public static ApacheHttpTransport newTrustedTransport()
       throws GeneralSecurityException, IOException {
@@ -60,9 +58,8 @@ public static ApacheHttpTransport newTrustedTransport()
 
   /**
    * {@link Beta} <br>
-   * Returns a new instance of {@link ApacheHttpTransport} that uses {@link
-   * GoogleUtils#getCertificateTrustStore()} for the trusted certificates. mtlsProvider can be used
-   * to configure mutual TLS for the transport.
+   * Returns a new instance of {@link ApacheHttpTransport} that default jdk certs for the trusted
+   * certificates. mtlsProvider can be used to configure mutual TLS for the transport.
    *
    * @param mtlsProvider MtlsProvider to configure mutual TLS for the transport
    */
@@ -105,22 +102,20 @@ public SocketFactoryRegistryHandler(MtlsProvider mtlsProvider)
         mtlsKeyStorePassword = mtlsProvider.getKeyStorePassword();
       }
 
-      // Use the included trust store
-      KeyStore trustStore = GoogleUtils.getCertificateTrustStore();
       SSLContext sslContext = SslUtils.getTlsSslContext();
 
       if (mtlsKeyStore != null && mtlsKeyStorePassword != null) {
         this.isMtls = true;
         SslUtils.initSslContext(
             sslContext,
-            trustStore,
+            null,
             SslUtils.getPkixTrustManagerFactory(),
             mtlsKeyStore,
             mtlsKeyStorePassword,
             SslUtils.getDefaultKeyManagerFactory());
       } else {
         this.isMtls = false;
-        SslUtils.initSslContext(sslContext, trustStore, SslUtils.getPkixTrustManagerFactory());
+        SslUtils.initSslContext(sslContext, null, SslUtils.getPkixTrustManagerFactory());
       }
       LayeredConnectionSocketFactory socketFactory = new SSLConnectionSocketFactory(sslContext);
 
diff --git a/google-api-client/src/test/java/com/google/api/client/googleapis/apache/v2/ITGoogleApacheHttpTransportTest.java b/google-api-client/src/test/java/com/google/api/client/googleapis/apache/v2/ITGoogleApacheHttpTransportTest.java
new file mode 100644
index 000000000..ef02117ad
--- /dev/null
+++ b/google-api-client/src/test/java/com/google/api/client/googleapis/apache/v2/ITGoogleApacheHttpTransportTest.java
@@ -0,0 +1,102 @@
+/*
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package com.google.api.client.googleapis.apache.v2;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.fail;
+
+import com.google.api.client.http.apache.v2.ApacheHttpTransport;
+import java.io.IOException;
+import java.security.GeneralSecurityException;
+import javax.net.ssl.SSLHandshakeException;
+import org.apache.http.HttpResponse;
+import org.apache.http.client.ClientProtocolException;
+import org.apache.http.client.ResponseHandler;
+import org.apache.http.client.methods.HttpGet;
+import org.junit.Test;
+
+public class ITGoogleApacheHttpTransportTest {
+
+  @Test
+  public void testHttpRequestFailsWhenMakingRequestToSiteWithoutDefaultJdkCerts()
+      throws GeneralSecurityException, IOException {
+    ApacheHttpTransport apacheHttpTransport = GoogleApacheHttpTransport.newTrustedTransport();
+    // Use a self-signed certificate site that won't be trusted by default trust store
+    HttpGet httpGet = new HttpGet("https://self-signed.badssl.com/");
+    Exception exception = null;
+    try {
+      apacheHttpTransport
+          .getHttpClient()
+          .execute(
+              httpGet,
+              new ResponseHandler<Object>() {
+
+                @Override
+                public Object handleResponse(HttpResponse httpResponse)
+                    throws ClientProtocolException, IOException {
+                  fail("Should not have been able to complete SSL request with untrusted cert.");
+                  return null;
+                }
+              });
+      fail("Expected SSLHandshakeException was not thrown");
+    } catch (SSLHandshakeException e) {
+      exception = e;
+    }
+
+    assertNotNull(exception);
+    assertEquals(exception.getClass(), SSLHandshakeException.class);
+  }
+
+  @Test
+  public void testHttpRequestPassesWhenMakingRequestToGoogleSite() throws Exception {
+    ApacheHttpTransport apacheHttpTransport = GoogleApacheHttpTransport.newTrustedTransport();
+    HttpGet httpGet = new HttpGet("https://www.google.com/");
+
+    apacheHttpTransport
+        .getHttpClient()
+        .execute(
+            httpGet,
+            new ResponseHandler<Object>() {
+              @Override
+              public Object handleResponse(HttpResponse httpResponse)
+                  throws ClientProtocolException, IOException {
+                assertEquals(200, httpResponse.getStatusLine().getStatusCode());
+                return null;
+              }
+            });
+  }
+
+  @Test
+  public void testHttpRequestPassesWhenMakingRequestToSiteContainedInDefaultCerts()
+      throws Exception {
+
+    ApacheHttpTransport apacheHttpTransport = GoogleApacheHttpTransport.newTrustedTransport();
+    HttpGet httpGet = new HttpGet("https://central.sonatype.com/");
+
+    apacheHttpTransport
+        .getHttpClient()
+        .execute(
+            httpGet,
+            new ResponseHandler<Object>() {
+              @Override
+              public Object handleResponse(HttpResponse httpResponse)
+                  throws ClientProtocolException, IOException {
+                assertEquals(200, httpResponse.getStatusLine().getStatusCode());
+                return null;
+              }
+            });
+  }
+}