diff --git a/app/src/test/java/com/wbrawner/simplemarkdown/FakePreferenceHelper.kt b/app/src/test/java/com/wbrawner/simplemarkdown/FakePreferenceHelper.kt
index a600129..d5b4cd1 100644
--- a/app/src/test/java/com/wbrawner/simplemarkdown/FakePreferenceHelper.kt
+++ b/app/src/test/java/com/wbrawner/simplemarkdown/FakePreferenceHelper.kt
@@ -23,6 +23,7 @@ class FakePreferenceHelper: PreferenceHelper {
         preferences[preference] = value
     }
 
+    @Suppress("UNCHECKED_CAST")
     override fun <T> observe(preference: Preference): StateFlow<T> =
         preferenceFlow(preference) as StateFlow<T>
 }
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