diff --git a/src/testdir/test_vim9_class.vim b/src/testdir/test_vim9_class.vim
index 98db71d..c859ee4 100644
--- a/src/testdir/test_vim9_class.vim
+++ b/src/testdir/test_vim9_class.vim
@@ -1180,6 +1180,61 @@
   END
   v9.CheckScriptFailure(lines, 'E1010:')
 
+  # Test for setting a member on a null object
+  lines =<< trim END
+    vim9script
+    class A
+        this.val: string
+    endclass
+
+    def F()
+        var obj: A
+        obj.val = ""
+    enddef
+    F()
+  END
+  v9.CheckScriptFailure(lines, 'E1360: Using a null object')
+
+  # Test for accessing a member on a null object
+  lines =<< trim END
+    vim9script
+    class A
+        this.val: string
+    endclass
+
+    def F()
+        var obj: A
+        echo obj.val
+    enddef
+    F()
+  END
+  v9.CheckScriptFailure(lines, 'E1360: Using a null object')
+
+  # Test for setting a member on a null object, at script level
+  lines =<< trim END
+    vim9script
+    class A
+        this.val: string
+    endclass
+
+    var obj: A
+    obj.val = ""
+  END
+  # FIXME(in source): this should give E1360 as well!
+  v9.CheckScriptFailure(lines, 'E1012: Type mismatch; expected object<A> but got string')
+
+  # Test for accessing a member on a null object, at script level
+  lines =<< trim END
+    vim9script
+    class A
+        this.val: string
+    endclass
+
+    var obj: A
+    echo obj.val
+  END
+  v9.CheckScriptFailure(lines, 'E1360: Using a null object')
+
   # Test for no space before or after the '=' when initializing a member
   # variable
   lines =<< trim END