diff --git a/src/mlx/warnings/regex_checker.py b/src/mlx/warnings/regex_checker.py
index dc6075c8..c40fdf27 100644
--- a/src/mlx/warnings/regex_checker.py
+++ b/src/mlx/warnings/regex_checker.py
@@ -196,10 +196,7 @@ def parse_config(self, config):
             classification_key = classification.lower().replace("_", " ")
             if classification_key in CoverityClassificationChecker.SEVERITY_MAP:
                 checker = CoverityClassificationChecker(classification=classification_key, verbose=self.verbose)
-                if maximum := checker_config.get("max", 0):
-                    checker.maximum = int(maximum)
-                if minimum := checker_config.get("min", 0):
-                    checker.minimum = int(minimum)
+                checker.parse_config(checker_config)
                 self.checkers[classification_key] = checker
             else:
                 print(f"WARNING: Unrecognized classification {classification!r}")
diff --git a/tests/test_coverity.py b/tests/test_coverity.py
index 5ff43ef7..5bb2394d 100644
--- a/tests/test_coverity.py
+++ b/tests/test_coverity.py
@@ -1,4 +1,5 @@
 from io import StringIO
+import os
 from unittest import TestCase
 from pathlib import Path
 import filecmp
@@ -13,9 +14,16 @@
 
 class TestCoverityWarnings(TestCase):
     def setUp(self):
+        os.environ['MIN_COV_WARNINGS'] = '0'
+        os.environ['MAX_COV_WARNINGS'] = '0'
         self.warnings = WarningsPlugin(verbose=True)
         self.warnings.activate_checker_name('coverity')
 
+    def tearDown(self):
+        for var in ('MIN_POLY_WARNINGS', 'MAX_POLY_WARNINGS'):
+            if var in os.environ:
+                del os.environ[var]
+
     def test_no_warning_normal_text(self):
         dut = 'This should not be treated as warning'
         self.warnings.check(dut)
diff --git a/tests/test_in/config_example_coverity.yml b/tests/test_in/config_example_coverity.yml
index 52f1eba5..22c85122 100644
--- a/tests/test_in/config_example_coverity.yml
+++ b/tests/test_in/config_example_coverity.yml
@@ -4,11 +4,13 @@ coverity:
     min: 0
     max: -1
   bug:
-    max: 0
-  pending:
     min: 0
     max: 0
+  pending:
+    min: $MIN_COV_WARNINGS
+    max: '$MAX_COV_WARNINGS'
   false_positive:
+    min: 0
     max: -1
 sphinx:
   enabled: false