Index: lldb/packages/Python/lldbsuite/test/lldbtest.py
===================================================================
--- lldb/packages/Python/lldbsuite/test/lldbtest.py
+++ lldb/packages/Python/lldbsuite/test/lldbtest.py
@@ -784,6 +784,9 @@
             # Inherit the TCC permissions from the inferior's parent.
             "settings set target.inherit-tcc true",
 
+            # Kill rather than detach from the inferior if something goes wrong.
+            "settings set target.detach-on-error false",
+
             # Disable fix-its by default so that incorrect expressions in tests don't
             # pass just because Clang thinks it has a fix-it.
             "settings set target.auto-apply-fixits false",
Index: lldb/test/API/types/AbstractBase.py
===================================================================
--- lldb/test/API/types/AbstractBase.py
+++ lldb/test/API/types/AbstractBase.py
@@ -155,6 +155,9 @@
         # Inherit TCC permissions. We can leave this set.
         self.runCmd('settings set target.inherit-tcc true')
 
+        # Kill rather than detach from the inferior if something goes wrong.
+        self.runCmd('settings set target.detach-on-error false')
+
         # And add hooks to restore the settings during tearDown().
         self.addTearDownHook(lambda: self.runCmd(
             "settings set target.inline-breakpoint-strategy headers"))
Index: lldb/test/Shell/lit-lldb-init.in
===================================================================
--- lldb/test/Shell/lit-lldb-init.in
+++ lldb/test/Shell/lit-lldb-init.in
@@ -5,3 +5,4 @@
 settings set symbols.clang-modules-cache-path "@LLDB_TEST_MODULE_CACHE_LLDB@"
 settings set target.auto-apply-fixits false
 settings set target.inherit-tcc true
+settings set target.detach-on-error false
Index: lldb/tools/lldb-test/lldb-test.cpp
===================================================================
--- lldb/tools/lldb-test/lldb-test.cpp
+++ lldb/tools/lldb-test/lldb-test.cpp
@@ -1105,6 +1105,9 @@
   Dbg->GetCommandInterpreter().HandleCommand(
       "settings set target.inherit-tcc true",
       /*add_to_history*/ eLazyBoolNo, Result);
+  Dbg->GetCommandInterpreter().HandleCommand(
+      "settings set target.detach-on-error false",
+      /*add_to_history*/ eLazyBoolNo, Result);
 
   if (!opts::Log.empty())
     Dbg->EnableLog("lldb", {"all"}, opts::Log, 0, errs());