diff --git a/lldb/packages/Python/lldbsuite/test/lldbplatformutil.py b/lldb/packages/Python/lldbsuite/test/lldbplatformutil.py
index 3d6402c13b47b6..94b133589dcc5a 100644
--- a/lldb/packages/Python/lldbsuite/test/lldbplatformutil.py
+++ b/lldb/packages/Python/lldbsuite/test/lldbplatformutil.py
@@ -4,11 +4,12 @@
 from __future__ import absolute_import
 
 # System modules
+import ctypes
 import itertools
+import os
 import re
 import subprocess
 import sys
-import os
 
 # Third-party modules
 import six
@@ -198,3 +199,14 @@ def hasChattyStderr(test_case):
     if match_android_device(test_case.getArchitecture(), ['aarch64'], range(22, 25+1)):
         return True  # The dynamic linker on the device will complain about unknown DT entries
     return False
+
+if getHostPlatform() == "linux":
+    def enable_attach():
+        """Enable attaching to _this_ process, if host requires such an action.
+        Suitable for use as a preexec_fn in subprocess.Popen and similar."""
+        c = ctypes.CDLL(None)
+        PR_SET_PTRACER = ctypes.c_int(0x59616d61)
+        PR_SET_PTRACER_ANY = ctypes.c_ulong(-1)
+        c.prctl(PR_SET_PTRACER, PR_SET_PTRACER_ANY)
+else:
+    enable_attach = None
diff --git a/lldb/packages/Python/lldbsuite/test/lldbtest.py b/lldb/packages/Python/lldbsuite/test/lldbtest.py
index c377b64e9b9ea3..958cadd3a7c812 100644
--- a/lldb/packages/Python/lldbsuite/test/lldbtest.py
+++ b/lldb/packages/Python/lldbsuite/test/lldbtest.py
@@ -384,7 +384,8 @@ def launch(self, executable, args):
             [executable] + args,
             stdout=open(
                 os.devnull) if not self._trace_on else None,
-            stdin=PIPE)
+            stdin=PIPE,
+            preexec_fn=lldbplatformutil.enable_attach)
 
     def terminate(self):
         if self._proc.poll() is None: