diff --git a/scripts/create_histogram_summary.py b/scripts/create_histogram_summary.py
index add088d6b7ef63d71a8a790ab7a6d6a2529d04ca..0b10b76b8d2ba3c2aebcabd9927276b4e7245c3c 100644
--- a/scripts/create_histogram_summary.py
+++ b/scripts/create_histogram_summary.py
@@ -143,6 +143,8 @@ if __name__ == "__main__":
             ax.set_title(fmt)
             ax.legend(loc="best")
             ax.set_xlabel(measure_label)
+            if "DIFF" in measure_label:
+                ax.set_xticks(range(len(limits_labels)), limits_labels, rotation=35)
             ax.set_ylabel("Number of test cases")
 
             fig.set_figheight(4)
diff --git a/scripts/pyivastest/IvasBaseClass.py b/scripts/pyivastest/IvasBaseClass.py
index c7c734c5c9733dc64da7b89bc891175d9d384462..75eddb2a8a620fdd28b014d936706056335f450d 100644
--- a/scripts/pyivastest/IvasBaseClass.py
+++ b/scripts/pyivastest/IvasBaseClass.py
@@ -134,15 +134,25 @@ class IvasLogger(logging.Logger):
 
 
 def getIvasLogger(name=None):
+    try:
+        # Python 3.13+
+        acquireLock, releaseLock = logging._prepareFork, logging._afterFork
+    except AttributeError:
+        # Python <= 3.12
+        acquireLock, releaseLock = logging._acquireLock, logging._releaseLock
+
     logging_class = logging.getLoggerClass()
-    logging._acquireLock()
+
+    acquireLock()
+
     try:
         logging.setLoggerClass(IvasLogger)
         logger = logging.getLogger(name)
         logging.setLoggerClass(logging_class)
         return logger
+
     finally:
-        logging._releaseLock()
+        releaseLock()
 
 
 class IvasBaseClass(object):
diff --git a/tests/renderer/utils.py b/tests/renderer/utils.py
index 3f37729133aac3f15f654e14393e3ba217be970b..ac5e31c79ab084b8b123ef06af3703e2a3c9be3a 100644
--- a/tests/renderer/utils.py
+++ b/tests/renderer/utils.py
@@ -325,12 +325,16 @@ def run_renderer(
             odg_ref = out_file_ref[0:-4] + ".BINAURAL.wav"
 
             if out_fmt not in PEAQ_SUPPORTED_FMT:
+                    if in_fmt in PEAQ_SUPPORTED_FMT:
+                        new_fmt = in_fmt # MONO or STEREO
+                    else:
+                        new_fmt = "BINAURAL"
                     # Render test to BINAURAL
                     cmd2 = RENDERER_CMD[:]
                     cmd2[2] = str(out_file)  # in_file
                     cmd2[4] = str(out_fmt)   # in_fmt
                     cmd2[6] = odg_test       # out_file
-                    cmd2[8] = "BINAURAL"     # out_fmt
+                    cmd2[8] = new_fmt        # out_fmt
                     cmd2[10] = str(sr)
                     cmd2[0] += BIN_SUFFIX_MERGETARGET # Use IVAS_rend_ref for re-rendering
                     cmd2[0] += binary_suffix
@@ -340,7 +344,7 @@ def run_renderer(
                     cmd2[2] = str(out_file_ref)  # in_file
                     cmd2[6] = odg_ref            # out_file
                     run_cmd(cmd2, env)
-                    out_fmt_bin = "BINAURAL"
+                    out_fmt_bin = new_fmt
             else:
                 out_fmt_bin = out_fmt
                 odg_test = out_file