diff --git a/Formula/r/recc.rb b/Formula/r/recc.rb
index 8ddf6d512b00b..1c7df4b5fdcd1 100644
--- a/Formula/r/recc.rb
+++ b/Formula/r/recc.rb
@@ -87,7 +87,7 @@ def generate_recc_server(bin_directory)
       #{bin}/buildbox-casd \
         --local-server-instance=recc-server \
         --protect-session-blobs \
-        #{var}/recc/casd
+        ${1:-#{var}/recc/casd}
     EOS
   end
 
@@ -174,10 +174,13 @@ def caveats
 
   test do
     system bin/"recc", "--version"
-    system bin/"recc-server &"
+    recc_cache_data_path="recc_cache_data_path"
+    recc_cache_data_path.mkpath
+    system bin/"recc-server #{recc_cache_data_path} &"
     "test.c".write <<~EOS
       int main() {}
     EOS
+    ENV["RECC_SERVER"]=recc_cache_data_path/"casd.sock"
     ENV["RECC_LOG_LEVEL"]="info"
     system bin/"recc-cc", "-c", "test.c"
     output = shell_output(bin/"recc-cc -c test.c 2>&1")