diff --git a/pkg/util/errors/types_test.go b/pkg/util/errors/types_test.go
new file mode 100644
index 0000000..8432bfe
--- /dev/null
+++ b/pkg/util/errors/types_test.go
@@ -0,0 +1,81 @@
+package errors
+
+import (
+	"errors"
+	"fmt"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestRetryError(t *testing.T) {
+	t.Run("NewRetryError with nil error", func(t *testing.T) {
+		retryErr := NewRetryError(nil)
+		assert.NotNil(t, retryErr)
+		assert.Nil(t, retryErr.Err)
+		assert.Equal(t, "retry error", retryErr.Error())
+	})
+
+	t.Run("NewRetryError with an underlying error", func(t *testing.T) {
+		innerErr := errors.New("something went wrong")
+		retryErr := NewRetryError(innerErr)
+		assert.NotNil(t, retryErr)
+		assert.Equal(t, innerErr, retryErr.Err)
+		assert.Equal(t, "[retry]: something went wrong", retryErr.Error())
+	})
+
+	t.Run("IsRetryError checks", func(t *testing.T) {
+		directRetryErr := NewRetryError(errors.New("direct"))
+		wrappedRetryErr := fmt.Errorf("wrapped: %w", directRetryErr)
+		otherErr := errors.New("not a retry error")
+
+		assert.True(t, IsRetryError(directRetryErr))
+		assert.True(t, IsRetryError(wrappedRetryErr))
+		assert.False(t, IsRetryError(otherErr))
+	})
+
+	t.Run("AsRetryError checks", func(t *testing.T) {
+		directRetryErr := NewRetryError(errors.New("direct"))
+		wrappedRetryErr := fmt.Errorf("wrapped: %w", directRetryErr)
+
+		var target *RetryError
+		assert.True(t, AsRetryError(wrappedRetryErr, &target))
+		assert.Equal(t, directRetryErr, target)
+	})
+}
+
+func TestBadRequestError(t *testing.T) {
+	t.Run("NewBadRequestError with nil error", func(t *testing.T) {
+		badReqErr := NewBadRequestError(nil)
+		assert.NotNil(t, badReqErr)
+		assert.Nil(t, badReqErr.Err)
+		assert.Equal(t, "fatal error", badReqErr.Error())
+	})
+
+	t.Run("NewBadRequestError with an underlying error", func(t *testing.T) {
+		innerErr := errors.New("invalid input")
+		badReqErr := NewBadRequestError(innerErr)
+		assert.NotNil(t, badReqErr)
+		assert.Equal(t, innerErr, badReqErr.Err)
+		assert.Equal(t, "invalid input", badReqErr.Error())
+	})
+
+	t.Run("IsBadRequest checks", func(t *testing.T) {
+		directBadReqErr := NewBadRequestError(errors.New("direct"))
+		wrappedBadReqErr := fmt.Errorf("wrapped: %w", directBadReqErr)
+		otherErr := errors.New("not a bad request error")
+
+		assert.True(t, IsBadRequest(directBadReqErr))
+		assert.True(t, IsBadRequest(wrappedBadReqErr))
+		assert.False(t, IsBadRequest(otherErr))
+	})
+
+	t.Run("AsBadRequest checks", func(t *testing.T) {
+		directBadReqErr := NewBadRequestError(errors.New("direct"))
+		wrappedBadReqErr := fmt.Errorf("wrapped: %w", directBadReqErr)
+
+		var target *BadRequestError
+		assert.True(t, AsBadRequest(wrappedBadReqErr, &target))
+		assert.Equal(t, directBadReqErr, target)
+	})
+}