Index: lldb/source/Plugins/DynamicLoader/MacOSX-DYLD/DynamicLoaderDarwin.cpp
===================================================================
--- lldb/source/Plugins/DynamicLoader/MacOSX-DYLD/DynamicLoaderDarwin.cpp
+++ lldb/source/Plugins/DynamicLoader/MacOSX-DYLD/DynamicLoaderDarwin.cpp
@@ -556,7 +556,8 @@
     }
   }
 
-  if (exe_idx != UINT32_MAX) {
+  // Set the target executable if we haven't found one so far.
+  if (exe_idx != UINT32_MAX && !target.GetExecutableModule()) {
     const bool can_create = true;
     ModuleSP exe_module_sp(FindTargetModuleForImageInfo(image_infos[exe_idx],
                                                         can_create, nullptr));
Index: lldb/test/API/functionalities/dlopen_other_executable/Makefile
===================================================================
--- /dev/null
+++ lldb/test/API/functionalities/dlopen_other_executable/Makefile
@@ -0,0 +1,8 @@
+C_SOURCES := main.c
+USE_LIBDL := 1
+
+other:
+	$(MAKE) -f $(MAKEFILE_RULES) C_SOURCES=other.c EXE=other
+all: other
+
+include Makefile.rules
Index: lldb/test/API/functionalities/dlopen_other_executable/TestDlopenOtherExecutable.py
===================================================================
--- /dev/null
+++ lldb/test/API/functionalities/dlopen_other_executable/TestDlopenOtherExecutable.py
@@ -0,0 +1,26 @@
+import lldb
+from lldbsuite.test.decorators import *
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test import lldbutil
+
+class TestCase(TestBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    @skipIfRemote
+    @skipIfWindows
+    @no_debug_info_test
+    def test(self):
+        self.build()
+        # Launch and stop before the dlopen call.
+        lldbutil.run_to_source_breakpoint(self, "// break here", lldb.SBFileSpec("main.c"))
+        # Check that the executable is the test binary.
+        self.assertEqual(self.target().GetExecutable().GetFilename(), "a.out")
+        # Continue so that dlopen is called.
+        breakpoint = self.target().BreakpointCreateBySourceRegex(
+            "// break after dlopen", lldb.SBFileSpec("main.c"))
+        self.assertTrue(breakpoint.IsValid())
+        stopped_threads = lldbutil.continue_to_breakpoint(self.process(), breakpoint)
+        self.assertEqual(len(stopped_threads), 1)
+        # Check that the executable is still the test binary and not "other".
+        self.assertEqual(self.target().GetExecutable().GetFilename(), "a.out")
Index: lldb/test/API/functionalities/dlopen_other_executable/main.c
===================================================================
--- /dev/null
+++ lldb/test/API/functionalities/dlopen_other_executable/main.c
@@ -0,0 +1,8 @@
+#include <dlfcn.h>
+
+int main() {
+  int i = 0; // break here
+  // dlopen the 'other' test executable.
+  dlopen("other", RTLD_LAZY);
+  return i; // break after dlopen
+}
Index: lldb/test/API/functionalities/dlopen_other_executable/other.c
===================================================================
--- /dev/null
+++ lldb/test/API/functionalities/dlopen_other_executable/other.c
@@ -0,0 +1 @@
+int main() {}