diff --git a/testhal/STM32F1xx/I2C/i2c_pns.c b/testhal/STM32F1xx/I2C/i2c_pns.c
index 180500a6c..96ac9a0bd 100644
--- a/testhal/STM32F1xx/I2C/i2c_pns.c
+++ b/testhal/STM32F1xx/I2C/i2c_pns.c
@@ -28,7 +28,7 @@
 /* I2C1 */
 static const I2CConfig i2cfg1 = {
     OPMODE_I2C,
-    400000,
+    360000,
     FAST_DUTY_CYCLE_16_9,
 };