diff --git a/fuzzers/041-clk-hrow-pips/clk_hrow_pip_list.tcl b/fuzzers/041-clk-hrow-pips/clk_hrow_pip_list.tcl
index 2679bd36..791a369d 100644
--- a/fuzzers/041-clk-hrow-pips/clk_hrow_pip_list.tcl
+++ b/fuzzers/041-clk-hrow-pips/clk_hrow_pip_list.tcl
@@ -23,6 +23,11 @@ proc print_tile_pips {tile_type filename} {
                 continue
             }
 
+            # Some ports appear to be just test signals, ignore these.
+            if [string match *TESTPLL* $src_node] {
+                continue
+            }
+
             if {[llength [get_nodes -uphill -of_objects [get_nodes -of_objects $dst]]] != 1} {
                 set pip_string "$tile_type.[regsub {.*/} $dst ""].[regsub {.*/} $src ""]"
                 if ![dict exists $pips $pip_string] {