diff --git a/tests/config/__init__.py b/tests/config/__init__.py
index 891742c96..ada70e2a5 100644
--- a/tests/config/__init__.py
+++ b/tests/config/__init__.py
@@ -2,17 +2,16 @@
 Test GEF configuration parameters.
 """
 
-
 from tests.utils import gdb_run_cmd
 from tests.utils import GefUnitTestGeneric
 
 
 class TestGefConfigUnit(GefUnitTestGeneric):
-    """Test GEF configuration paramaters."""
+    """Test GEF configuration parameters."""
 
 
     def test_config_show_opcodes_size(self):
-        """Check opcodes are correctly shown"""
+        """Check opcodes are correctly shown."""
         res = gdb_run_cmd("entry-break", before=["gef config context.show_opcodes_size 4"])
         self.assertNoException(res)
         self.assertGreater(len(res.splitlines()), 1)
@@ -20,3 +19,12 @@ def test_config_show_opcodes_size(self):
         # output format: 0xaddress   opcode  <symbol+offset>   mnemo  [operands, ...]
         # example: 0x5555555546b2 897dec      <main+8>         mov    DWORD PTR [rbp-0x14], edi
         self.assertRegex(res, r"(0x([0-9a-f]{2})+)\s+(([0-9a-f]{2})+)\s+<[^>]+>\s+(.*)")
+
+    def test_config_validator(self):
+        """Check that a GefSetting hook can prevent setting a config."""
+        res = gdb_run_cmd("gef config get.tempdir '/tmp/path with space'")
+        self.assertException(res)
+        self.assertRegex(res, r".+Cannot set.+setting cannot contain spaces")
+
+        res = gdb_run_cmd("gef config get.tempdir '/tmp/valid-path'")
+        self.assertNoException(res)