diff --git a/difftest/dpi_t1/src/lib.rs b/difftest/dpi_t1/src/lib.rs
index d70184f2d..cac7d2352 100644
--- a/difftest/dpi_t1/src/lib.rs
+++ b/difftest/dpi_t1/src/lib.rs
@@ -25,7 +25,7 @@ pub(crate) struct OnlineArgs {
   pub timeout: u64,
 }
 
-const TIMEOUT_DEFAULT: u64 = 1000000;
+const TIMEOUT_DEFAULT: u64 = 100000000;
 
 impl OnlineArgs {
   pub fn from_plusargs(matcher: &PlusArgMatcher) -> Self {
diff --git a/difftest/dpi_t1rocket/src/lib.rs b/difftest/dpi_t1rocket/src/lib.rs
index 7801cb159..def80b9ba 100644
--- a/difftest/dpi_t1rocket/src/lib.rs
+++ b/difftest/dpi_t1rocket/src/lib.rs
@@ -16,7 +16,7 @@ pub(crate) struct OnlineArgs {
   pub timeout: u64,
 }
 
-const TIMEOUT_DEFAULT: u64 = 1000000;
+const TIMEOUT_DEFAULT: u64 = 100000000;
 
 impl OnlineArgs {
   pub fn from_plusargs(matcher: &PlusArgMatcher) -> Self {