diff --git a/src/config/test_case.rs b/src/config/test_case.rs
index aee3dd6..ed779c9 100644
--- a/src/config/test_case.rs
+++ b/src/config/test_case.rs
@@ -68,9 +68,14 @@ impl Default for TestCaseConfig {
             with_light_client_prover: false,
             with_full_node: false,
             timeout: Duration::from_secs(60),
-            dir: TempDir::new()
-                .expect("Failed to create temporary directory")
-                .into_path(),
+            dir: std::env::var("TEST_OUT_DIR").map_or_else(
+                |_| {
+                    TempDir::new()
+                        .expect("Failed to create temporary directory")
+                        .into_path()
+                },
+                PathBuf::from,
+            ),
             docker: TestCaseDockerConfig::default(),
             genesis_dir: None,
         }