diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/pump/virtual/VirtualPumpPlugin.kt b/app/src/main/java/info/nightscout/androidaps/plugins/pump/virtual/VirtualPumpPlugin.kt
index debd4e30ea..7d72e9deae 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/pump/virtual/VirtualPumpPlugin.kt
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/pump/virtual/VirtualPumpPlugin.kt
@@ -40,7 +40,7 @@ import javax.inject.Singleton
 import kotlin.math.min
 
 @Singleton
-class VirtualPumpPlugin @Inject constructor(
+open class VirtualPumpPlugin @Inject constructor(
     injector: HasAndroidInjector,
     aapsLogger: AAPSLogger,
     private val rxBus: RxBusWrapper,
diff --git a/app/src/test/java/info/nightscout/androidaps/plugins/aps/loop/LoopPluginTest.kt b/app/src/test/java/info/nightscout/androidaps/plugins/aps/loop/LoopPluginTest.kt
index fc092046d2..32c37d1603 100644
--- a/app/src/test/java/info/nightscout/androidaps/plugins/aps/loop/LoopPluginTest.kt
+++ b/app/src/test/java/info/nightscout/androidaps/plugins/aps/loop/LoopPluginTest.kt
@@ -27,16 +27,9 @@ import info.nightscout.androidaps.utils.sharedPreferences.SP
 import org.junit.Assert
 import org.junit.Before
 import org.junit.Test
-import org.junit.runner.RunWith
 import org.mockito.Mock
 import org.mockito.Mockito.`when`
-import org.powermock.core.classloader.annotations.PrepareForTest
-import org.powermock.modules.junit4.PowerMockRunner
 
-@RunWith(PowerMockRunner::class)
-@PrepareForTest(
-    ConstraintChecker::class, VirtualPumpPlugin::class, FabricPrivacy::class, ReceiverStatusStore::class,
-    IobCobCalculatorPlugin::class, AppRepository::class)
 class LoopPluginTest : TestBase() {
 
     @Mock lateinit var sp: SP
diff --git a/core/src/main/java/info/nightscout/androidaps/plugins/configBuilder/ConstraintChecker.kt b/core/src/main/java/info/nightscout/androidaps/plugins/configBuilder/ConstraintChecker.kt
index 07b4f8f66b..0ceee93a06 100644
--- a/core/src/main/java/info/nightscout/androidaps/plugins/configBuilder/ConstraintChecker.kt
+++ b/core/src/main/java/info/nightscout/androidaps/plugins/configBuilder/ConstraintChecker.kt
@@ -10,7 +10,7 @@ import javax.inject.Inject
 import javax.inject.Singleton
 
 @Singleton
-class ConstraintChecker @Inject constructor(private val activePlugin: ActivePluginProvider) : ConstraintsInterface {
+open class ConstraintChecker @Inject constructor(private val activePlugin: ActivePluginProvider) : ConstraintsInterface {
 
     fun isLoopInvocationAllowed(): Constraint<Boolean> =
         isLoopInvocationAllowed(Constraint(true))
diff --git a/core/src/main/java/info/nightscout/androidaps/receivers/ReceiverStatusStore.kt b/core/src/main/java/info/nightscout/androidaps/receivers/ReceiverStatusStore.kt
index 30090d386f..897360a01b 100644
--- a/core/src/main/java/info/nightscout/androidaps/receivers/ReceiverStatusStore.kt
+++ b/core/src/main/java/info/nightscout/androidaps/receivers/ReceiverStatusStore.kt
@@ -9,7 +9,7 @@ import javax.inject.Inject
 import javax.inject.Singleton
 
 @Singleton
-class ReceiverStatusStore @Inject constructor(val context: Context, val rxBus: RxBusWrapper) {
+open class ReceiverStatusStore @Inject constructor(val context: Context, val rxBus: RxBusWrapper) {
 
     var lastNetworkEvent: EventNetworkChange? = null
 
diff --git a/core/src/main/java/info/nightscout/androidaps/utils/FabricPrivacy.kt b/core/src/main/java/info/nightscout/androidaps/utils/FabricPrivacy.kt
index abad290b32..c956409fb2 100644
--- a/core/src/main/java/info/nightscout/androidaps/utils/FabricPrivacy.kt
+++ b/core/src/main/java/info/nightscout/androidaps/utils/FabricPrivacy.kt
@@ -18,7 +18,7 @@ import javax.inject.Singleton
  * emulates the methods but ignores the request if the instance is null or invalid.
  */
 @Singleton
-class FabricPrivacy @Inject constructor(
+open class FabricPrivacy @Inject constructor(
     private val aapsLogger: AAPSLogger,
     private val sp: SP
 ) {
diff --git a/database/src/main/java/info/nightscout/androidaps/database/AppRepository.kt b/database/src/main/java/info/nightscout/androidaps/database/AppRepository.kt
index da47ce1d55..b7cc2f707c 100644
--- a/database/src/main/java/info/nightscout/androidaps/database/AppRepository.kt
+++ b/database/src/main/java/info/nightscout/androidaps/database/AppRepository.kt
@@ -18,7 +18,7 @@ import javax.inject.Inject
 import javax.inject.Singleton
 
 @Singleton
-class AppRepository @Inject internal constructor(
+open class AppRepository @Inject internal constructor(
     internal val database: AppDatabase
 ) {