diff --git a/gst-env.py b/gst-env.py
index 42e07ddd4b..1a5c05bf7c 100755
--- a/gst-env.py
+++ b/gst-env.py
@@ -110,7 +110,7 @@ def get_target_install_filename(target, filename):
 
 def get_pkgconfig_variable_from_pcfile(pcfile, varname):
     variables = {}
-    substre = re.compile('\$\{[^${}]+\}')
+    substre = re.compile(r'\$\{[^${}]+\}')
     with pcfile.open('r', encoding='utf-8') as f:
         for line in f:
             if '=' not in line:
diff --git a/subprojects/gst-devtools/validate/launcher/apps/gstvalidate.py b/subprojects/gst-devtools/validate/launcher/apps/gstvalidate.py
index 1aef8e6011..ca29283c0d 100644
--- a/subprojects/gst-devtools/validate/launcher/apps/gstvalidate.py
+++ b/subprojects/gst-devtools/validate/launcher/apps/gstvalidate.py
@@ -1351,7 +1351,7 @@ not been tested and explicitly activated if you set use --wanted-tests ALL""")
             # MXF known issues"
             ("*reverse_playback.*mxf",
              "Reverse playback is not handled in MXF"),
-            ("file\.transcode.*mxf",
+            (r'file\.transcode.*mxf',
              "FIXME: Transcoding and mixing tests need to be tested"),
 
             # WMV known issues"
diff --git a/subprojects/gst-devtools/validate/launcher/baseclasses.py b/subprojects/gst-devtools/validate/launcher/baseclasses.py
index 3073e2e3e5..d902774bd7 100644
--- a/subprojects/gst-devtools/validate/launcher/baseclasses.py
+++ b/subprojects/gst-devtools/validate/launcher/baseclasses.py
@@ -2396,7 +2396,7 @@ class ScenarioManager(Loggable):
         mfile_bname = os.path.basename(mfile)
 
         for f in os.listdir(os.path.dirname(mfile)):
-            if re.findall("%s\..*\.%s$" % (re.escape(mfile_bname), self.FILE_EXTENSION), f):
+            if re.findall(r'%s\..*\.%s$' % (re.escape(mfile_bname), self.FILE_EXTENSION), f):
                 scenarios.append(os.path.join(os.path.dirname(mfile), f))
 
         if scenarios: