diff --git a/tests/playTests.sh b/tests/playTests.sh
index 3d6bcdb0b..72a47d634 100755
--- a/tests/playTests.sh
+++ b/tests/playTests.sh
@@ -16,7 +16,7 @@ datagen() {
     "$DATAGEN_BIN" "$@"
 }
 
-alias zstd="$EXE_PREFIX $ZSTD_BIN"
+alias zstd='$EXE_PREFIX $ZSTD_BIN'
 
 sudoZstd() {
     if [ -z "$EXE_PREFIX" ]; then