diff --git a/app/src/test/java/org/mozilla/fenix/tabstray/browser/InactiveTabsControllerTest.kt b/app/src/test/java/org/mozilla/fenix/tabstray/browser/InactiveTabsControllerTest.kt
index 7f5e043762..f09ecb77e3 100644
--- a/app/src/test/java/org/mozilla/fenix/tabstray/browser/InactiveTabsControllerTest.kt
+++ b/app/src/test/java/org/mozilla/fenix/tabstray/browser/InactiveTabsControllerTest.kt
@@ -14,6 +14,7 @@ import io.mockk.verify
 import mozilla.components.browser.state.state.TabSessionState
 import mozilla.components.browser.state.store.BrowserStore
 import mozilla.components.browser.tabstray.TabsTray
+import mozilla.components.support.test.libstate.ext.waitUntilIdle
 import org.junit.Assert.assertEquals
 import mozilla.components.browser.state.state.createTab as createTabState
 import org.junit.Test
@@ -47,6 +48,8 @@ class InactiveTabsControllerTest {
 
         controller.updateCardExpansion(true)
 
+        appStore.waitUntilIdle()
+
         verify { tray.updateTabs(capture(tabsSlot), any()) }
 
         assertEquals(2, tabsSlot.captured.size)