diff --git a/hil-test/tests/parl_io_tx.rs b/hil-test/tests/parl_io_tx.rs
index ede919bf0c..a4efbb3c19 100644
--- a/hil-test/tests/parl_io_tx.rs
+++ b/hil-test/tests/parl_io_tx.rs
@@ -1,7 +1,6 @@
 //! PARL_IO TX test
 
 //% CHIPS: esp32c6 esp32h2
-
 #![no_std]
 #![no_main]
 
@@ -95,7 +94,7 @@ mod tests {
             ctx.parl_io,
             ctx.dma_channel.configure(false, DmaPriority::Priority0),
             tx_descriptors,
-            20.MHz(),
+            10.MHz(),
         )
         .unwrap();
 
@@ -162,7 +161,7 @@ mod tests {
             ctx.parl_io,
             ctx.dma_channel.configure(false, DmaPriority::Priority0),
             tx_descriptors,
-            20.MHz(),
+            10.MHz(),
         )
         .unwrap();
 
diff --git a/hil-test/tests/parl_io_tx_async.rs b/hil-test/tests/parl_io_tx_async.rs
index f551336947..22d9b989b8 100644
--- a/hil-test/tests/parl_io_tx_async.rs
+++ b/hil-test/tests/parl_io_tx_async.rs
@@ -97,7 +97,7 @@ mod tests {
             ctx.dma_channel
                 .configure_for_async(false, DmaPriority::Priority0),
             tx_descriptors,
-            20.MHz(),
+            10.MHz(),
         )
         .unwrap();
 
@@ -164,7 +164,7 @@ mod tests {
             ctx.dma_channel
                 .configure_for_async(false, DmaPriority::Priority0),
             tx_descriptors,
-            20.MHz(),
+            10.MHz(),
         )
         .unwrap();