diff --git a/plugins/woocommerce/tests/php/includes/wc-formatting-functions-test.php b/plugins/woocommerce/tests/php/includes/wc-formatting-functions-test.php
index 93dfda3b314..426255ffaff 100644
--- a/plugins/woocommerce/tests/php/includes/wc-formatting-functions-test.php
+++ b/plugins/woocommerce/tests/php/includes/wc-formatting-functions-test.php
@@ -17,4 +17,15 @@ class WC_Formatting_Functions_Test extends \WC_Unit_Test_Case {
 		$this->assertEquals( 'DUMMYCOUPON', wc_sanitize_coupon_code( 'DUMMYCOUPON' ) );
 		$this->assertEquals( 'a&a', wc_sanitize_coupon_code( 'a&a' ) );
 	}
+
+	/**
+	 * Test wc_format_postcode() function.
+	 */
+	public function test_wc_format_postcode() {
+		// IE postcode.
+		$this->assertEquals( 'D02 AF30', wc_format_postcode( 'D02AF30', 'IE' ) );
+
+		// PT postcode.
+		$this->assertEquals( '1000-205', wc_format_postcode( '1000205', 'PT' ) );
+	}
 }