diff --git a/llvm/test/DebugInfo/symbolize-gnu-debuglink-no-realpath.test b/llvm/test/DebugInfo/symbolize-gnu-debuglink-no-realpath.test
index 5141ff6ce322c..63c9f82bb0a63 100644
--- a/llvm/test/DebugInfo/symbolize-gnu-debuglink-no-realpath.test
+++ b/llvm/test/DebugInfo/symbolize-gnu-debuglink-no-realpath.test
@@ -1,4 +1,6 @@
-# REQUIRES: shell
+# This test uses symlinks.
+UNSUPPORTED: system-windows
+
 # Ensure that no realpath assumptions are made about .gnu_debuglink paths.
 
 # Copy inputs to some other location with arbitrary names, with the original
diff --git a/llvm/test/Other/lit-unicode.txt b/llvm/test/Other/lit-unicode.txt
index 2f40001451688..d884337d7cb2e 100644
--- a/llvm/test/Other/lit-unicode.txt
+++ b/llvm/test/Other/lit-unicode.txt
@@ -1,5 +1,5 @@
-FIXME: See if we can fix this in lit by using Unicode strings.
-REQUIRES: shell
+Windows echo does not have good Unicode support.
+UNSUPPORTED: system-windows
 
 RUN: echo "ようこそ" | FileCheck %s
 CHECK: {{^}}ようこそ{{$}}
diff --git a/llvm/test/tools/llvm-rc/windres-prefix.test b/llvm/test/tools/llvm-rc/windres-prefix.test
index 4c53fdfc3db65..a907666284704 100644
--- a/llvm/test/tools/llvm-rc/windres-prefix.test
+++ b/llvm/test/tools/llvm-rc/windres-prefix.test
@@ -1,4 +1,5 @@
-; REQUIRES: shell
+; This test uses symlinks.
+; UNSUPPORTED: system-windows
 
 ; RUN: rm -rf %t && mkdir %t