diff --git a/compiler/testData/codegen/box/ir/serializationRegressions/signatureClash.kt b/compiler/testData/codegen/box/ir/serializationRegressions/signatureClash.kt
index a1667620500..197bfd2f9ac 100644
--- a/compiler/testData/codegen/box/ir/serializationRegressions/signatureClash.kt
+++ b/compiler/testData/codegen/box/ir/serializationRegressions/signatureClash.kt
@@ -3,6 +3,7 @@
 // IGNORE_BACKEND: JS_IR_ES6
 // IGNORE_BACKEND: JVM_IR
 // IGNORE_BACKEND: NATIVE
+// IGNORE_BACKEND_FIR: JVM_IR
 // MODULE: lib
 // FILE: lib.kt
 
diff --git a/compiler/testData/codegen/box/package/mainInFiles.kt b/compiler/testData/codegen/box/package/mainInFiles.kt
index 423aa39d980..48bbd7ad905 100644
--- a/compiler/testData/codegen/box/package/mainInFiles.kt
+++ b/compiler/testData/codegen/box/package/mainInFiles.kt
@@ -1,3 +1,4 @@
+// IGNORE_BACKEND_FIR: JVM_IR
 // TARGET_BACKEND: JVM
 
 // WITH_RUNTIME