diff --git a/tools/testing/selftests/run_kselftest.sh b/tools/testing/selftests/run_kselftest.sh
index ec79160b8d8b..8fa808e10455 100755
--- a/tools/testing/selftests/run_kselftest.sh
+++ b/tools/testing/selftests/run_kselftest.sh
@@ -4,12 +4,7 @@
 # Run installed kselftest tests.
 #
 
-# Fallback to readlink if realpath is not available
-if which realpath > /dev/null; then
-        BASE_DIR=$(realpath $(dirname $0))
-else
-        BASE_DIR=$(readlink -f $(dirname $0))
-fi
+BASE_DIR=$(cd "$(dirname "$0")" && pwd -P)
 
 cd $BASE_DIR
 TESTS="$BASE_DIR"/kselftest-list.txt