diff --git a/libexec/pyenv-version-file b/libexec/pyenv-version-file
index 2e8a23ba..33548571 100755
--- a/libexec/pyenv-version-file
+++ b/libexec/pyenv-version-file
@@ -38,7 +38,9 @@ find_local_version_file() {
 if [ -n "$target_dir" ]; then
   find_local_version_file "$target_dir"
 else
-  find_local_version_file "$PYENV_DIR" || {
+  # In tests, PYENV_DIR is not set, ultimately leading to "cd: null directory" in OpenSUSE
+  # While most `cd` implemntations treat an empty argument the same as missing, that's still wrong
+  find_local_version_file "${PYENV_DIR:=$PWD}" || {
     [ "$PYENV_DIR" != "$PWD" ] && find_local_version_file "$PWD"
   } || echo "${PYENV_ROOT}/version"
 fi