diff --git a/lldb/source/Plugins/Process/FreeBSDRemote/NativeRegisterContextFreeBSD_x86_64.cpp b/lldb/source/Plugins/Process/FreeBSDRemote/NativeRegisterContextFreeBSD_x86_64.cpp
--- a/lldb/source/Plugins/Process/FreeBSDRemote/NativeRegisterContextFreeBSD_x86_64.cpp
+++ b/lldb/source/Plugins/Process/FreeBSDRemote/NativeRegisterContextFreeBSD_x86_64.cpp
@@ -215,9 +215,9 @@
     {"Floating Point Registers", "fpu", k_num_fpr_registers_i386,
      g_fpu_regnums_i386},
     {"Debug Registers", "dbr", k_num_dbr_registers_i386, g_dbr_regnums_i386},
-    {"Extended AVX registers", "avx", k_num_avx_registers_i386,
+    {"Advanced Vector Extensions", "avx", k_num_avx_registers_i386,
      g_avx_regnums_i386},
-    {"Extended MPX registers", "mpx", k_num_mpx_registers_i386,
+    {"Memory Protection Extensions", "mpx", k_num_mpx_registers_i386,
      g_mpx_regnums_i386},
 };
 
@@ -229,9 +229,9 @@
      g_fpu_regnums_x86_64},
     {"Debug Registers", "dbr", k_num_dbr_registers_x86_64,
      g_dbr_regnums_x86_64},
-    {"Extended AVX registers", "avx", k_num_avx_registers_x86_64,
+    {"Advanced Vector Extensions", "avx", k_num_avx_registers_x86_64,
      g_avx_regnums_x86_64},
-    {"Extended MPX registers", "mpx", k_num_mpx_registers_x86_64,
+    {"Memory Protection Extensions", "mpx", k_num_mpx_registers_x86_64,
      g_mpx_regnums_x86_64},
 };
 
diff --git a/lldb/test/API/commands/register/register/register_command/TestRegisters.py b/lldb/test/API/commands/register/register/register_command/TestRegisters.py
--- a/lldb/test/API/commands/register/register/register_command/TestRegisters.py
+++ b/lldb/test/API/commands/register/register/register_command/TestRegisters.py
@@ -404,7 +404,12 @@
             for registerSet in registerSets:
                 if 'advanced vector extensions' in registerSet.GetName().lower():
                     has_avx = True
-                if 'memory protection extension' in registerSet.GetName().lower():
+                # FreeBSD/NetBSD reports missing register sets differently
+                # at the moment and triggers false positive here.
+                # TODO: remove FreeBSD/NetBSD exception when we make unsupported
+                # register groups correctly disappear.
+                if ('memory protection extension' in registerSet.GetName().lower()
+                        and self.getPlatform() not in ["freebsd", "netbsd"]):
                     has_mpx = True
 
             if has_avx:
diff --git a/lldb/test/API/tools/lldb-server/TestLldbGdbServer.py b/lldb/test/API/tools/lldb-server/TestLldbGdbServer.py
--- a/lldb/test/API/tools/lldb-server/TestLldbGdbServer.py
+++ b/lldb/test/API/tools/lldb-server/TestLldbGdbServer.py
@@ -433,7 +433,7 @@
             "Advanced Vector Extensions" in register_sets)
 
     @expectedFailureAll(oslist=["windows"]) # no avx for now.
-    @expectedFailureAll(oslist=["freebsd", "netbsd"])
+    @expectedFailureAll(oslist=["netbsd"])
     @llgs_test
     def test_qRegisterInfo_contains_avx_registers_llgs(self):
         self.init_llgs_test()