diff --git a/android/test/arch/src/test/kotlin/net/mullvad/mullvadvpn/test/arch/ViewModelTests.kt b/android/test/arch/src/test/kotlin/net/mullvad/mullvadvpn/test/arch/ViewModelTests.kt
index 32fe3d76505d..12f88ceb28cf 100644
--- a/android/test/arch/src/test/kotlin/net/mullvad/mullvadvpn/test/arch/ViewModelTests.kt
+++ b/android/test/arch/src/test/kotlin/net/mullvad/mullvadvpn/test/arch/ViewModelTests.kt
@@ -2,6 +2,7 @@ package net.mullvad.mullvadvpn.test.arch
 
 import androidx.lifecycle.ViewModel
 import com.lemonappdev.konsist.api.Konsist
+import com.lemonappdev.konsist.api.ext.list.functions
 import com.lemonappdev.konsist.api.ext.list.modifierprovider.withPublicOrDefaultModifier
 import com.lemonappdev.konsist.api.ext.list.properties
 import com.lemonappdev.konsist.api.ext.list.withAllParentsOf
@@ -23,6 +24,13 @@ class ViewModelTests {
         }
     }
 
+    @Test
+    fun ensurePublicFunctionsHaveNoReturnType() {
+        allViewModels().functions().withPublicOrDefaultModifier().assert { function ->
+            function.hasReturnType.not()
+        }
+    }
+
     private fun allViewModels() =
         Konsist.scopeFromProject().classes().withAllParentsOf(ViewModel::class)