diff --git a/benchmarks/driver.sh b/benchmarks/driver.sh
index ed5235c16..af32ed001 100755
--- a/benchmarks/driver.sh
+++ b/benchmarks/driver.sh
@@ -9,20 +9,30 @@ FISH_PATH=$1
 FISH2_PATH=$2
 BENCHMARKS_DIR=$(dirname "$0")/benchmarks
 
+quote() {
+    # Single-quote the given string for a POSIX shell, except in common cases that don't need it.
+    printf %s "$1" |
+        sed "/[^[:alnum:]\/.-]/ {
+            s/'/'\\\''/g
+            s/^/'/
+            s/\$/'/
+        }"
+}
+
 for benchmark in "$BENCHMARKS_DIR"/*; do
     basename "$benchmark"
     [ -n "$FISH2_PATH" ] && echo "$FISH_PATH"
-    ${FISH_PATH} --print-rusage-self "$benchmark" > /dev/null
+    "${FISH_PATH}" --print-rusage-self "$benchmark" > /dev/null
     if [ -n "$FISH2_PATH" ]; then
         echo "$FISH2_PATH"
-        ${FISH2_PATH} --print-rusage-self "$benchmark" > /dev/null
+        "${FISH2_PATH}" --print-rusage-self "$benchmark" > /dev/null
     fi
 
     if command -v hyperfine >/dev/null 2>&1; then
         if [ -n "$FISH2_PATH" ]; then
-            hyperfine "${FISH_PATH} $benchmark > /dev/null" "${FISH2_PATH} $benchmark > /dev/null"
+            hyperfine "$(quote "${FISH_PATH}") $benchmark > /dev/null" "$(quote "${FISH2_PATH}") $benchmark > /dev/null"
         else
-            hyperfine "${FISH_PATH} $benchmark > /dev/null"
+            hyperfine "$(quote "${FISH_PATH}") $benchmark > /dev/null"
         fi
     fi
 done