diff --git a/tests/hwsim/vm/combine-codecov.sh b/tests/hwsim/vm/combine-codecov.sh
index 014d615be..3fe844389 100755
--- a/tests/hwsim/vm/combine-codecov.sh
+++ b/tests/hwsim/vm/combine-codecov.sh
@@ -17,8 +17,16 @@ for i in lcov-*.info-*; do
 done
 
 lcov $args -o $LOGDIR/combined.info > $LOGDIR/combined-lcov.log 2>&1
+cat $LOGDIR/combined.info |
+    sed "/^TN:$/{N;s/TN:\n\(SF:.*\/bits\/byteswap.h$\)/\1/};/^SF:.*\/bits\/byteswap.h$/,/^end_of_record$/d" |
+    sed "/^TN:$/{N;s/TN:\n\(SF:.*\/common\/wpa_ctrl.c$\)/\1/};/^SF:.*\/common\/wpa_ctrl.c$/,/^end_of_record$/d" |
+    sed "/^TN:$/{N;s/TN:\n\(SF:.*\/utils\/edit.c$\)/\1/};/^SF:.*\/utils\/edit.c$/,/^end_of_record$/d" |
+    sed "/^TN:$/{N;s/TN:\n\(SF:.*_module_tests.c$\)/\1/};/^SF:.*_module_tests.c$/,/^end_of_record$/d" |
+    sed "/^TN:$/{N;s/TN:\n\(SF:.*\/hostapd\/hostapd_cli.c$\)/\1/};/^SF:.*\/hostapd\/hostapd_cli.c$/,/^end_of_record$/d" |
+    sed "/^TN:$/{N;s/TN:\n\(SF:.*wpa_supplicant\/wpa_cli.c$\)/\1/};/^SF:.*wpa_supplicant\/wpa_cli.c$/,/^end_of_record$/d" > $LOGDIR/combined.info.filtered
+
 cd $LOGDIR
-genhtml -t "wpa_supplicant/hostapd combined for hwsim test run $(date +%s)" combined.info --output-directory $ODIR > lcov.log 2>&1
+genhtml -t "wpa_supplicant/hostapd combined for hwsim test run $(date +%s)" combined.info.filtered --output-directory $ODIR > lcov.log 2>&1
 
 rm -r /tmp/logs/alt-wpa_supplicant
 rm -r /tmp/logs/alt-hostapd