diff --git a/Corona-Warn-App/proguard-rules.pro b/Corona-Warn-App/proguard-rules.pro
index 13dfa13cd055802fd1285f1182d31af5f22bf11a..a494dc86a67e75431934ce0fd0adeeab58b9ddee 100644
--- a/Corona-Warn-App/proguard-rules.pro
+++ b/Corona-Warn-App/proguard-rules.pro
@@ -72,9 +72,6 @@
 -dontwarn sun.misc.**
 #-keep class com.google.gson.stream.** { *; }
 
-# Application classes that will be serialized/deserialized over Gson
--keep class com.google.gson.examples.android.model.** { <fields>; }
-
 # Prevent proguard from stripping interface information from TypeAdapter, TypeAdapterFactory,
 # JsonSerializer, JsonDeserializer instances (so they can be used in @JsonAdapter)
 -keep class * extends com.google.gson.TypeAdapter
@@ -87,4 +84,6 @@
   @com.google.gson.annotations.SerializedName <fields>;
 }
 
-##---------------End: proguard configuration for Gson  ----------
\ No newline at end of file
+##---------------End: proguard configuration for Gson  ----------
+
+-keep class de.rki.coronawarnapp.server.protocols.internal.** { *; }
\ No newline at end of file
diff --git a/Corona-Warn-App/src/deviceForTesters/java/de/rki/coronawarnapp/test/appconfig/ui/AppConfigTestFragment.kt b/Corona-Warn-App/src/deviceForTesters/java/de/rki/coronawarnapp/test/appconfig/ui/AppConfigTestFragment.kt
index 742411f39edaa87b0a911267cb3b4d527326c194..09567384fd47b06010a3379f788b0f8b5f2a6f78 100644
--- a/Corona-Warn-App/src/deviceForTesters/java/de/rki/coronawarnapp/test/appconfig/ui/AppConfigTestFragment.kt
+++ b/Corona-Warn-App/src/deviceForTesters/java/de/rki/coronawarnapp/test/appconfig/ui/AppConfigTestFragment.kt
@@ -32,12 +32,9 @@ class AppConfigTestFragment : Fragment(R.layout.fragment_test_appconfig), AutoIn
         super.onViewCreated(view, savedInstanceState)
 
         vm.currentConfig.observe2(this) { data ->
-            binding.currentConfiguration.text =
-                data?.rawConfig?.toString() ?: "No config available."
-            binding.lastUpdate.text = data?.updatedAt?.let { timeFormatter.print(it) } ?: "n/a"
-            binding.timeOffset.text = data?.let {
-                "${it.localOffset.millis}ms (configType=${it.configType})"
-            } ?: "n/a"
+            binding.currentConfiguration.text = data.rawConfig.toString()
+            binding.lastUpdate.text = timeFormatter.print(data.updatedAt)
+            binding.timeOffset.text = "${data.localOffset.millis}ms (configType=${data.configType})"
         }
 
         vm.errorEvent.observe2(this) {