diff --git a/cmake/script/CoverageInclude.cmake.in b/cmake/script/CoverageInclude.cmake.in
index 8fe11b48037f1..96a459303dcf2 100644
--- a/cmake/script/CoverageInclude.cmake.in
+++ b/cmake/script/CoverageInclude.cmake.in
@@ -24,7 +24,15 @@ separate_arguments(LCOV_OPTS)
 set(LCOV_COMMAND ${LCOV_EXECUTABLE} --gcov-tool ${CMAKE_CURRENT_LIST_DIR}/cov_tool_wrapper.sh ${LCOV_OPTS})
 
 find_program(GENHTML_EXECUTABLE genhtml REQUIRED)
-set(GENHTML_COMMAND ${GENHTML_EXECUTABLE} --show-details ${LCOV_OPTS})
+
+# HTML_OPTS is optionally passed via -D flag.
+# Default: inherit LCOV_OPTS. If HTML_OPTS is provided (even if empty), use it instead.
+set(GENHTML_OPTS ${LCOV_OPTS})
+if(DEFINED HTML_OPTS)
+  separate_arguments(HTML_OPTS)
+  set(GENHTML_OPTS ${HTML_OPTS})
+endif()
+set(GENHTML_COMMAND ${GENHTML_EXECUTABLE} --show-details ${GENHTML_OPTS})
 
 find_program(GREP_EXECUTABLE grep REQUIRED)
 find_program(AWK_EXECUTABLE awk REQUIRED)
diff --git a/doc/developer-notes.md b/doc/developer-notes.md
index c8851a8dd0999..8c4d7b159b2c0 100644
--- a/doc/developer-notes.md
+++ b/doc/developer-notes.md
@@ -508,6 +508,17 @@ enabled by setting `LCOV_OPTS="--rc branch_coverage=1"`:
 cmake -DLCOV_OPTS="--rc branch_coverage=1" -P build/Coverage.cmake
 ```
 
+HTML_OPTS can override the genhtml options (which default to LCOV_OPTS). If HTML_OPTS is omitted, LCOV_OPTS are implicitly passed to genhtml. If HTML_OPTS is provided but empty (e.g. -DHTML_OPTS=""), no options are passed to genhtml and LCOV_OPTS are not inherited.
+
+Examples:
+```
+# Override genhtml options explicitly
+cmake -DHTML_OPTS="--title 'Knots Coverage'" -P build/Coverage.cmake
+
+# Provide an empty override: pass nothing to genhtml (do not inherit LCOV_OPTS)
+cmake -DHTML_OPTS="" -P build/Coverage.cmake
+```
+
 To enable test parallelism:
 ```
 cmake -DJOBS=$(nproc) -P build/Coverage.cmake