diff --git a/llvm/test/tools/llvm-mca/X86/BtVer2/skip-unsupported-instructions-none-remain.s b/llvm/test/tools/llvm-mca/X86/BtVer2/skip-unsupported-instructions-none-remain.s
index a8f78159c1990..0d67f53e12f1e 100644
--- a/llvm/test/tools/llvm-mca/X86/BtVer2/skip-unsupported-instructions-none-remain.s
+++ b/llvm/test/tools/llvm-mca/X86/BtVer2/skip-unsupported-instructions-none-remain.s
@@ -1,5 +1,5 @@
-# RUN: not llvm-mca -mtriple=x86_64-unknown-unknown -mcpu=btver2 -skip-unsupported-instructions %s |& FileCheck --check-prefixes=CHECK-ALL,CHECK-SKIP %s
-# RUN: not llvm-mca -mtriple=x86_64-unknown-unknown -mcpu=btver2 %s |& FileCheck --check-prefixes=CHECK-ALL,CHECK-ERROR %s
+# RUN: not llvm-mca -mtriple=x86_64-unknown-unknown -mcpu=btver2 -skip-unsupported-instructions %s 2>&1 | FileCheck --check-prefixes=CHECK-ALL,CHECK-SKIP %s
+# RUN: not llvm-mca -mtriple=x86_64-unknown-unknown -mcpu=btver2 %s 2>&1 | FileCheck --check-prefixes=CHECK-ALL,CHECK-ERROR %s
 
 # Test defends that if all instructions are skipped leaving an empty input, an error is printed.
 
diff --git a/llvm/test/tools/llvm-mca/X86/BtVer2/unsupported-instruction.s b/llvm/test/tools/llvm-mca/X86/BtVer2/unsupported-instruction.s
index eec6de6648a69..3690a1101be9d 100644
--- a/llvm/test/tools/llvm-mca/X86/BtVer2/unsupported-instruction.s
+++ b/llvm/test/tools/llvm-mca/X86/BtVer2/unsupported-instruction.s
@@ -1,5 +1,5 @@
-# RUN: llvm-mca -mtriple=x86_64-unknown-unknown -mcpu=btver2 -skip-unsupported-instructions -timeline %s |& FileCheck --check-prefix=CHECK-SKIP %s
-# RUN: not llvm-mca -mtriple=x86_64-unknown-unknown -mcpu=btver2 %s |& FileCheck --check-prefix=CHECK-ERROR %s
+# RUN: llvm-mca -mtriple=x86_64-unknown-unknown -mcpu=btver2 -skip-unsupported-instructions -timeline %s 2>&1 | FileCheck --check-prefix=CHECK-SKIP %s
+# RUN: not llvm-mca -mtriple=x86_64-unknown-unknown -mcpu=btver2 %s 2>&1 | FileCheck --check-prefix=CHECK-ERROR %s
 
 # Test checks that unsupported instructions exit with an error, unless -skip-unsupported-instructions is passed, in which case the remaining instructions should be analysed.