diff --git a/app/src/test/java/com/wbrawner/simplemarkdown/MarkdownViewModelTest.kt b/app/src/test/java/com/wbrawner/simplemarkdown/MarkdownViewModelTest.kt
index f4e0a88..a360c8d 100644
--- a/app/src/test/java/com/wbrawner/simplemarkdown/MarkdownViewModelTest.kt
+++ b/app/src/test/java/com/wbrawner/simplemarkdown/MarkdownViewModelTest.kt
@@ -23,6 +23,7 @@ import timber.log.Timber
 import java.io.File
 import java.net.URI
 
+@OptIn(ExperimentalCoroutinesApi::class)
 class MarkdownViewModelTest {
     private lateinit var fileHelper: FakeFileHelper
     private lateinit var preferenceHelper: FakePreferenceHelper