diff --git a/compiler/testData/diagnostics/tests/typealias/nestedSubstituted.fir.kt b/compiler/testData/diagnostics/tests/typealias/nestedSubstituted.fir.kt
new file mode 100644
index 00000000000..0d534ec8478
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/typealias/nestedSubstituted.fir.kt
@@ -0,0 +1,9 @@
+// !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_PARAMETER -TOPLEVEL_TYPEALIASES_ONLY
+
+class Pair<T1, T2>(val x1: T1, val x2: T2)
+
+class C<T> {
+    typealias P2 = Pair<T, Int>
+}
+
+val p1: C<String>.P2 = <!TYPE_MISMATCH, TYPE_MISMATCH!>Pair("", 1)<!>
diff --git a/compiler/testData/diagnostics/tests/typealias/nestedSubstituted.kt b/compiler/testData/diagnostics/tests/typealias/nestedSubstituted.kt
index cf159437453..e5ec2fb2f50 100644
--- a/compiler/testData/diagnostics/tests/typealias/nestedSubstituted.kt
+++ b/compiler/testData/diagnostics/tests/typealias/nestedSubstituted.kt
@@ -1,4 +1,3 @@
-// FIR_IDENTICAL
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_PARAMETER -TOPLEVEL_TYPEALIASES_ONLY
 
 class Pair<T1, T2>(val x1: T1, val x2: T2)