--- a/compiler-rt/test/sanitizer_common/ios_commands/iossim_run.py
+++ b/compiler-rt/test/sanitizer_common/ios_commands/iossim_run.py
@@ -1,7 +1,10 @@
 #!/usr/bin/env python3
 
-import glob, os, pipes, sys, subprocess
-
+import glob, os, sys, subprocess
+try:
+    from pipes import quote
+except ImportError:
+    from shlex import quote
 
 device_id = os.environ.get("SANITIZER_IOSSIM_TEST_DEVICE_IDENTIFIER")
 iossim_run_verbose = os.environ.get("SANITIZER_IOSSIM_RUN_VERBOSE")
@@ -49,8 +52,7 @@ if prog == "rm":
             # Don't quote glob pattern
             rm_args.append(arg)
         else:
-            # FIXME(dliew): pipes.quote() is deprecated
-            rm_args.append(pipes.quote(arg))
+            rm_args.append(quote(arg))
     rm_cmd_line = ["/bin/rm"] + rm_args
     rm_cmd_line_str = " ".join(rm_cmd_line)
     # We use `shell=True` so that any wildcard globs get expanded by the shell.
--- a/clang/utils/creduce-clang-crash.py
+++ b/clang/utils/creduce-clang-crash.py
@@ -15,7 +15,6 @@ import shutil
 import stat
 import sys
 import subprocess
-import pipes
 import shlex
 import tempfile
 import shutil
@@ -61,7 +60,7 @@ def check_cmd(cmd_name, cmd_dir, cmd_pat
 
 
 def quote_cmd(cmd):
-    return " ".join(pipes.quote(arg) for arg in cmd)
+    return " ".join(shlex.quote(arg) for arg in cmd)
 
 
 def write_to_script(text, filename):
@@ -220,7 +219,7 @@ fi
         )
 
         for msg in self.expected_output:
-            output += "grep -F %s t.log || exit 1\n" % pipes.quote(msg)
+            output += "grep -F %s t.log || exit 1\n" % shlex.quote(msg)
 
         write_to_script(output, self.testfile)
         self.check_interestingness()
--- a/libcxx/utils/libcxx/test/dsl.py
+++ b/libcxx/utils/libcxx/test/dsl.py
@@ -8,8 +8,8 @@
 
 import os
 import pickle
-import pipes
 import platform
+import shlex
 import shutil
 import tempfile
 
@@ -290,7 +290,7 @@ def hasAnyLocale(config, locales):
       }
     #endif
   """
-    return programSucceeds(config, program, args=[pipes.quote(l) for l in locales])
+    return programSucceeds(config, program, args=[shlex.quote(l) for l in locales])
 
 
 @_memoizeExpensiveOperation(lambda c, flags="": (c.substitutions, c.environment, flags))