diff --git a/core/datastore/build.gradle.kts b/core/datastore/build.gradle.kts
index 8f3d7ece6..23271a35a 100644
--- a/core/datastore/build.gradle.kts
+++ b/core/datastore/build.gradle.kts
@@ -33,6 +33,11 @@ android {
         consumerProguardFiles("consumer-proguard-rules.pro")
     }
     namespace = "com.google.samples.apps.nowinandroid.core.datastore"
+    testOptions {
+        unitTests {
+            isReturnDefaultValues = true
+        }
+    }
 }
 
 // Setup protobuf configuration, generating lite Java and Kotlin classes