diff --git a/test_regress/driver.pl b/test_regress/driver.pl
index 3507e013d..77ff135ed 100755
--- a/test_regress/driver.pl
+++ b/test_regress/driver.pl
@@ -2195,7 +2195,7 @@ sub files_identical {
                     && !/\+\+\+ \/tmp\//  # t_difftree.pl
             } @l1;
             @l1 = map {
-                s/(Internal Error: [^\n]+\.cpp):[0-9]+:/$1:#:/;
+                s/(Internal Error: [^\n]+\.(cpp|h)):[0-9]+:/$1:#:/;
                 s/^-V\{t[0-9]+,[0-9]+\}/-V{t#,#}/;  # --vlt vs --vltmt run differences
                 $_;
             } @l1;
diff --git a/test_regress/t/t_tri_array.out b/test_regress/t/t_tri_array.out
index 35c846494..4ca9228ce 100644
--- a/test_regress/t/t_tri_array.out
+++ b/test_regress/t/t_tri_array.out
@@ -15,7 +15,7 @@
                              : ... In instance t
    28 |       Pad pad0 (.pad(pad[g]),
       |                         ^
-%Error: Internal Error: t/t_tri_array.v:25:22: ../V3Dfg.h:529: DfgVertex is not of expected type, but instead has type 'VARPACKED'
+%Error: Internal Error: t/t_tri_array.v:25:22: ../V3Dfg.h:#: DfgVertex is not of expected type, but instead has type 'VARPACKED'
    25 |       Pad pad1 (.pad(pad[g]),
       |                      ^~~
                         ... See the manual at https://verilator.org/verilator_doc.html for more assistance.