diff --git a/app/src/androidTest/kotlin/io/flamenet/messenger/app/FeatureUseTest.kt b/app/src/androidTest/kotlin/io/flamenet/messenger/app/FeatureUseTest.kt
index 1be7171..60e2bf3 100644
--- a/app/src/androidTest/kotlin/io/flamenet/messenger/app/FeatureUseTest.kt
+++ b/app/src/androidTest/kotlin/io/flamenet/messenger/app/FeatureUseTest.kt
@@ -130,8 +130,13 @@ class FeatureUseTest {
         compose.onNodeWithTag("create-group").performClick()
 
         // The group list carries a `group-<id>` row once the relay answers.
+        // The id is the relay's randomHexToken(), not a number. Matching
+        // `group-\d+` only worked when the hex happened to start with a digit,
+        // ten times in sixteen, so the test failed a third of the time on a
+        // group that was plainly there. Sixteen or more hex characters keeps
+        // `group-name` and `group-member-N` from matching instead.
         awaitNodeMatching(
-            Regex("group-\\d+"),
+            Regex("group-[0-9a-f]{16,}"),
             150_000,
             "the group never appeared in the list after Create",
         )