diff --git a/adb/Android.bp b/adb/Android.bp
index 3e8da8a..b39defe 100644
--- a/adb/Android.bp
+++ b/adb/Android.bp
@@ -730,39 +730,3 @@
         "fastdeploy/testdata/sample.cd",
     ],
 }
-
-prebuilt_etc {
-    name: "com.android.adbd.ld.config.txt",
-    src: "apex/ld.config.txt",
-    filename: "ld.config.txt",
-    installable: false,
-}
-
-apex {
-    name: "com.android.adbd",
-    manifest: "apex/apex_manifest.json",
-
-    binaries: ["adbd"],
-    prebuilts: ["com.android.adbd.init.rc", "com.android.adbd.ld.config.txt"],
-
-    key: "com.android.adbd.key",
-    certificate: ":com.android.adbd.certificate",
-}
-
-apex_key {
-    name: "com.android.adbd.key",
-    public_key: "apex/com.android.adbd.avbpubkey",
-    private_key: "apex/com.android.adbd.pem",
-}
-
-android_app_certificate {
-    name: "com.android.adbd.certificate",
-    certificate: "apex/com.android.adbd",
-}
-
-prebuilt_etc {
-    name: "com.android.adbd.init.rc",
-    src: "apex/adbd.rc",
-    filename: "init.rc",
-    installable: false,
-}
diff --git a/adb/apex/Android.bp b/adb/apex/Android.bp
new file mode 100644
index 0000000..40ea448
--- /dev/null
+++ b/adb/apex/Android.bp
@@ -0,0 +1,49 @@
+apex_defaults {
+    name: "com.android.adbd-defaults",
+
+    binaries: ["adbd"],
+    prebuilts: ["com.android.adbd.init.rc", "com.android.adbd.ld.config.txt"],
+
+    key: "com.android.adbd.key",
+    certificate: ":com.android.adbd.certificate",
+}
+
+apex {
+    name: "com.android.adbd",
+    defaults: ["com.android.adbd-defaults"],
+    manifest: "apex_manifest.json",
+}
+
+// adbd apex with INT_MAX version code, to allow for upgrade/rollback testing.
+apex {
+    name: "test_com.android.adbd",
+    defaults: ["com.android.adbd-defaults"],
+    manifest: "test_apex_manifest.json",
+    file_contexts: ":com.android.adbd-file_contexts",
+    installable: false,
+}
+
+prebuilt_etc {
+    name: "com.android.adbd.ld.config.txt",
+    src: "ld.config.txt",
+    filename: "ld.config.txt",
+    installable: false,
+}
+
+prebuilt_etc {
+    name: "com.android.adbd.init.rc",
+    src: "adbd.rc",
+    filename: "init.rc",
+    installable: false,
+}
+
+apex_key {
+    name: "com.android.adbd.key",
+    public_key: "com.android.adbd.avbpubkey",
+    private_key: "com.android.adbd.pem",
+}
+
+android_app_certificate {
+    name: "com.android.adbd.certificate",
+    certificate: "com.android.adbd",
+}
diff --git a/adb/apex/test_apex_manifest.json b/adb/apex/test_apex_manifest.json
new file mode 100644
index 0000000..7131977
--- /dev/null
+++ b/adb/apex/test_apex_manifest.json
@@ -0,0 +1,4 @@
+{
+  "name": "com.android.adbd",
+  "version": 2147483647
+}