diff --git a/autotest.sh b/autotest.sh
index 6e0c6f594..bebbe9128 100755
--- a/autotest.sh
+++ b/autotest.sh
@@ -33,7 +33,7 @@ if hash lcov; then
 		--rc genhtml_legend=1
 		--rc geninfo_all_blocks=1
 		"
-	export LCOV="lcov $LCOV_OPTS"
+	export LCOV="lcov $LCOV_OPTS --no-external"
 	export GENHTML="genhtml $LCOV_OPTS"
 	# zero out coverage data
 	$LCOV -q -c -i -t "Baseline" -d $src -o cov_base.info
@@ -126,7 +126,6 @@ if hash lcov; then
 	# generate coverage data and combine with baseline
 	$LCOV -q -c -d $src -t "$(hostname)" -o cov_test.info
 	$LCOV -q -a cov_base.info -a cov_test.info -o cov_total.info
-	$LCOV -q -r cov_total.info '/usr/*' -o cov_total.info
 	$LCOV -q -r cov_total.info 'test/*' -o cov_total.info
 	$GENHTML cov_total.info -t "$(hostname)" -o $out/coverage
 	chmod -R a+rX $out/coverage