diff --git a/service/Android.bp b/service/Android.bp
index 91b9d1c..45e43bc 100644
--- a/service/Android.bp
+++ b/service/Android.bp
@@ -198,11 +198,10 @@
     lint: { strict_updatability_linting: true },
 }
 
-java_library {
-    name: "service-connectivity",
+java_defaults {
+    name: "service-connectivity-defaults",
     sdk_version: "system_server_current",
     min_sdk_version: "30",
-    installable: true,
     // This library combines system server jars that have access to different bootclasspath jars.
     // Lower SDK service jars must not depend on higher SDK jars as that would let them
     // transitively depend on the wrong bootclasspath jars. Sources also cannot be added here as
@@ -224,6 +223,24 @@
     lint: { strict_updatability_linting: true },
 }
 
+// A special library created strictly for use by the tests as they need the
+// implementation library but that is not available when building from prebuilts.
+// Using a library with a different name to what is used by the prebuilts ensures
+// that this will never depend on the prebuilt.
+// Switching service-connectivity to a java_sdk_library would also have worked as
+// that has built in support for managing this but that is too big a change at this
+// point.
+java_library {
+    name: "service-connectivity-for-tests",
+    defaults: ["service-connectivity-defaults"],
+}
+
+java_library {
+    name: "service-connectivity",
+    defaults: ["service-connectivity-defaults"],
+    installable: true,
+}
+
 filegroup {
     name: "connectivity-jarjar-rules",
     srcs: ["jarjar-rules.txt"],