diff --git a/util/gnu-json-result.py b/util/gnu-json-result.py
index 1cd16e64c..c1adb3ffc 100644
--- a/util/gnu-json-result.py
+++ b/util/gnu-json-result.py
@@ -18,7 +18,7 @@ for filepath in test_dir.glob("**/*.log"):
             current[key] = {}
         current = current[key]
     try:
-        with open(path) as f:
+        with open(path, errors="ignore") as f:
             content = f.read()
             result = re.search(
                 r"(PASS|FAIL|SKIP|ERROR) [^ ]+ \(exit status: \d+\)$", content