diff --git a/scripts/kokoro.sh b/scripts/kokoro.sh
index 340d640..2c3c5a6 100755
--- a/scripts/kokoro.sh
+++ b/scripts/kokoro.sh
@@ -23,7 +23,7 @@ make clean
 progs=(docker docker-compose bazel npm curl)
 for p in "${progs[@]}"
 do
-  command -v $p > /dev/null 2>&1 || \
+  command -v "$p" > /dev/null 2>&1 || \
     { echo >&2 "$p is required but not installed. Aborting."; exit 1; }
 done
 
diff --git a/scripts/test-proxy.sh b/scripts/test-proxy.sh
index ad77d64..6484d71 100755
--- a/scripts/test-proxy.sh
+++ b/scripts/test-proxy.sh
@@ -45,6 +45,6 @@ s1=$(echo "$out" | base64 -d | \
 echo "$s1" | base64 -d | xxd
 
 # Take the 28 bytes we cut out above, the base64-encoded string should be this
-if [ "$s1" != "AAAAAAcKBWhlbGxvgGdycGMtc3RhdHVzOjANCg==" ]; then
+if [[ "$s1" != "AAAAAAcKBWhlbGxvgGdycGMtc3RhdHVzOjANCg==" ]]; then
   exit 1;
 fi