diff --git a/libraries/io/ddr3/hdllib.cfg b/libraries/io/ddr3/hdllib.cfg
index 5c8f38d2de5d777906cffdb76ff5eae9b4e8caa8..31551a6fba849e4cf4f78ffc5c7240839a289aac 100644
--- a/libraries/io/ddr3/hdllib.cfg
+++ b/libraries/io/ddr3/hdllib.cfg
@@ -22,6 +22,9 @@ test_bench_files =
     tb/vhdl/tb_seq_ddr3.vhd
     tb/vhdl/tb_ddr3_transpose.vhd
 
+regression_test_vhdl = 
+    #tb/vhdl/tb_ddr3.vhd   -- tb fails, ddr3 library may be obsolete, better use io_ddr
+
 
 [modelsim_project_file]
 modelsim_copy_files =