diff --git a/internal/config/config.go b/internal/config/config.go
index ecefc8e..a3c4bb6 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -28,6 +28,9 @@ var DefaultIgnores = []string{
 	".idea",
 	".vscode",
 	"dependency-reduced-pom.xml",
+	"__pycache__",
+	"venv",
+	"env",
 }
 
 var DefaultExts = []string{
@@ -43,6 +46,7 @@ var DefaultExts = []string{
 	".jar",
 	".war",
 	".ear",
+	".pyc", ".pyo",
 }
 
 var FrontendExts = []string{
diff --git a/internal/filter/filter.go b/internal/filter/filter.go
index a9867a7..13b7895 100644
--- a/internal/filter/filter.go
+++ b/internal/filter/filter.go
@@ -99,6 +99,16 @@ func isTestFile(path, name string) bool {
 		}
 		slashPath := filepath.ToSlash(path)
 		return strings.Contains(slashPath, "/src/test/")
+	case ".py":
+		lower := strings.ToLower(name)
+		if strings.HasPrefix(lower, "test_") || strings.HasSuffix(lower, "_test.py") {
+			return true
+		}
+		if strings.EqualFold(name, "conftest.py") {
+			return true
+		}
+		slashPath := filepath.ToSlash(path)
+		return strings.Contains(slashPath, "/tests/")
 	}
 
 	return false