diff --git a/.env.example b/.env.example
index 369ebb8e2f43..50bee2932737 100644
--- a/.env.example
+++ b/.env.example
@@ -24,3 +24,6 @@ GT_KAFKA_ENDPOINTS = localhost:9092
 
 # Setting for fuzz tests
 GT_MYSQL_ADDR = localhost:4002
+
+# Setting for usntable fuzz tests
+GT_FUZZ_BINARY_PATH=/home/weny/Projects/greptimedb/target/debug/greptime
\ No newline at end of file
diff --git a/tests-fuzz/README.md b/tests-fuzz/README.md
index c1e2147fb4bd..81b4806c703b 100644
--- a/tests-fuzz/README.md
+++ b/tests-fuzz/README.md
@@ -9,6 +9,25 @@ cargo install cargo-fuzz
 2. Start GreptimeDB
 3. Copy the `.env.example`, which is at project root, to `.env` and change the values on need.
 
+### For stable fuzz tests
+Set the GreptimeDB MySQL address.
+```
+GT_MYSQL_ADDR = localhost:4002
+```
+
+### For unstable fuzz tests
+Set the binary path of the GreptimeDB:
+```
+GT_FUZZ_BINARY_PATH = /path/to/
+```
+
+Change the instance root directory(the default value: `/tmp/unstable_greptime/`)
+```
+GT_FUZZ_BINARY_PATH = /path/to/
+```
+
+
+
 ## Run
 1. List all fuzz targets
 ```bash
diff --git a/tests-fuzz/targets/unstable/fuzz_create_table_standalone.rs b/tests-fuzz/targets/unstable/fuzz_create_table_standalone.rs
index 8e306156f4fd..13e4f9a3d7cc 100644
--- a/tests-fuzz/targets/unstable/fuzz_create_table_standalone.rs
+++ b/tests-fuzz/targets/unstable/fuzz_create_table_standalone.rs
@@ -157,7 +157,7 @@ async fn execute_unstable_create_table(
 
     loop {
         let sql = "DROP DATABASE IF EXISTS public";
-        match sqlx::query(&sql).execute(&ctx.greptime).await {
+        match sqlx::query(sql).execute(&ctx.greptime).await {
             Ok(result) => {
                 info!("Drop table: {}, result: {result:?}", sql);
                 break;