diff --git a/t/t0021-conversion.sh b/t/t0021-conversion.sh
index e09716d52d..bcaac6b14a 100755
--- a/t/t0021-conversion.sh
+++ b/t/t0021-conversion.sh
@@ -7,8 +7,8 @@ export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 
 . ./test-lib.sh
 
-TEST_ROOT="$PWD"
-PATH=$TEST_ROOT$PATH_SEP$PATH
+TEST_ROOT="$(pwd)"
+PATH=$PWD$PATH_SEP$PATH
 
 write_script <<\EOF "$TEST_ROOT/rot13.sh"
 tr \