diff --git a/testament/htmlgen.nim b/testament/htmlgen.nim
index 8e58dd95e..174f36d0b 100644
--- a/testament/htmlgen.nim
+++ b/testament/htmlgen.nim
@@ -16,7 +16,7 @@ import "testamenthtml.nimf"
 proc generateTestResultPanelPartial(outfile: File, testResultRow: JsonNode) =
   let
     trId = htmlQuote(testResultRow["category"].str & "_" & testResultRow["name"].str).
-        multiReplace({".": "_", " ": "_", ":": "_"})
+        multiReplace({".": "_", " ": "_", ":": "_", "/": "_"})
     name = testResultRow["name"].str.htmlQuote()
     category = testResultRow["category"].str.htmlQuote()
     target = testResultRow["target"].str.htmlQuote()