diff --git a/summarize_test_results.py b/summarize_test_results.py
index b194fbb..00db562 100644
--- a/summarize_test_results.py
+++ b/summarize_test_results.py
@@ -440,7 +440,7 @@ def format_by_test(summary, structure, file_out=None):
     """print metrics bucketed by test class"""
     title = structure["title"]
     anchor = structure["anchor"]
-    print(f"\n<h2 id={anchor}><a name={anchor}>{title}</a></h2>\n", file=file_out)
+    print(f"\n<h2 id={anchor}><a class=doctocat-link name={anchor}>{title}</a></h2>\n", file=file_out)
 
     table = PrettyTable(align="l")
     table.field_names = structure["header"]
@@ -477,7 +477,7 @@ def format_by_code(summary, structure, file_out=None):
     """print metrics bucketed by failing code"""
     title = structure["title"]
     anchor = structure["anchor"]
-    print(f"\n<h2 id={anchor}><a name={anchor}>{title}</a></h2>\n", file=file_out)
+    print(f"\n<h2 id={anchor}><a class=doctocat-link name={anchor}>{title}</a></h2>\n", file=file_out)
 
     table = PrettyTable(align="l")
     table.field_names = structure["header"]
@@ -518,7 +518,7 @@ def format_durations_table(test_times, structure, file_out=None):
     """print the table of durations per test"""
     title = structure["title"]
     anchor = structure["anchor"]
-    print(f"\n<h2 id={anchor}><a name={anchor}>{title}</a></h2>\n", file=file_out)
+    print(f"\n<h2 id={anchor}><a class=doctocat-link name={anchor}>{title}</a></h2>\n", file=file_out)
 
     table = PrettyTable(align="l", max_width=80)
     table.set_style(MARKDOWN)
@@ -541,7 +541,7 @@ def format_suite_durations_table(suite_times, structure, file_out=None):
     """print the table of durations for the whole suite, per platform"""
     title = structure["title"]
     anchor = structure["anchor"]
-    print(f"\n<h2 id={anchor}><a name={anchor}>{title}</a></h2>\n", file=file_out)
+    print(f"\n<h2 id={anchor}><a class=doctocat-link name={anchor}>{title}</a></h2>\n", file=file_out)
 
     table = PrettyTable(align="l", max_width=80)
     table.set_style(MARKDOWN)