Attempt to fix GitLab CI configuration

.gitlab-ci.yml

@@ -112,10 +112,10 @@ public-send-test:
   before_script: []
   script:
     # Generate random file, upload/download and assert equality
-    - head -c1m </dev/urandom >testfile
-    - ./ffsend upload testfile -n testfile.bin -a -d 10 -p secret -I
-    - ./ffsend download $(./ffsend history -q) -p secret -I -o downloadfile
-    - cmp --silent ./testfile ./downloadfile || (echo ERROR: Downloaded file is different than original; exit 1)
+    - "head -c16m </dev/urandom >testfile"
+    - "./ffsend upload testfile -n testfile.bin -a -d 10 -p secret -I"
+    - "./ffsend download \$(./ffsend history -q) -p secret -I -o downloadfile"
+    - "cmp --silent ./testfile ./downloadfile || (echo ERROR: Downloaded file is different than original; exit 1)"
 
 # Cargo crate release
 crate: