diff --git a/tests/cmp_pcm.py b/tests/cmp_pcm.py
index 8bb4dd92f43841e827c103a4fd47d46a7ee00dc2..c19bf6a6d9a85d9f7464c84e7e5aec12a4951545 100755
--- a/tests/cmp_pcm.py
+++ b/tests/cmp_pcm.py
@@ -91,7 +91,7 @@ def cmp_pcm(
     cmp_result = pyaudio3dtools.audioarray.compare(
         s1,
         s2,
-        fs * 1000,
+        fs,
         per_frame=False,
         get_mld=get_mld,
         get_ssnr=get_ssnr,
diff --git a/tests/conftest.py b/tests/conftest.py
index 853412cb180d5afc3899956309082e3398e04722..1fd548641756c62ec2caca1954059152ebc95f2f 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1185,20 +1185,20 @@ def compare_dmx_signals(ref_dmx_files, dut_dmx_files, fs) -> dict:
                 ref_dmx_files,
                 dmx_file_ref_tmp.name,
                 out_nchans=nchannels,
-                in_fs=fs,
+                in_fs=fs*1000,
             )
             pyaudio3dtools.audiofile.combinefiles(
                 dut_dmx_files,
                 dmx_file_dut_tmp.name,
                 out_nchans=nchannels,
-                in_fs=fs,
+                in_fs=fs*1000,
             )
 
             dmx_differs, reason = cmp_pcm(
                 dmx_file_ref_tmp.name,
                 dmx_file_dut_tmp.name,
                 nchannels,
-                fs,
+                fs*1000,
                 get_mld=True,
                 get_ssnr=True,
                 quiet=True,