diff --git a/idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/ExpectedCompletionUtils.kt b/idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/ExpectedCompletionUtils.kt
index be67bc289ce..f1f4c4aec80 100644
--- a/idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/ExpectedCompletionUtils.kt
+++ b/idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/ExpectedCompletionUtils.kt
@@ -274,7 +274,7 @@ object ExpectedCompletionUtils {
         for (unexpectedProposal in unexpected) {
             for (proposal in itemsInformation) {
                 Assert.assertFalse(
-                    "Unexpected '$unexpectedProposal' presented in $allItemsString",
+                    "Unexpected '$unexpectedProposal' presented in\n$allItemsString",
                     proposal.matches(unexpectedProposal)
                 )
             }