diff --git a/tests/SimpleDiscountCalculatorTest.php b/tests/SimpleDiscountCalculatorTest.php
index 37a6da5..7007f5b 100644
--- a/tests/SimpleDiscountCalculatorTest.php
+++ b/tests/SimpleDiscountCalculatorTest.php
@@ -27,6 +27,13 @@ public function testSimpleDiscountAmountFactory() {
      */
     private function assertDiscountAmount(SimpleDiscountCalculator $discountCalculator) {
         $this->assertEquals(6500, $discountCalculator->getDiscountAmount());
+
+        $this->assertEquals(100000, $discountCalculator->getAmountDue());
+        $this->assertEquals(0.13, $discountCalculator->getAnnualDiscountRate());
+        $this->assertEquals(TimeSpan::asDuration(0, 6), $discountCalculator->getTime());
+        $this->assertEquals(0.5, $discountCalculator->getTimeInYears());
+        $this->assertEquals(6, $discountCalculator->getTimeInMonths());
+        $this->assertEquals(180, $discountCalculator->getTimeInDays());
     }
 
     /**
diff --git a/tests/SimpleInterestCalculatorTest.php b/tests/SimpleInterestCalculatorTest.php
index 380ffa4..25389a2 100644
--- a/tests/SimpleInterestCalculatorTest.php
+++ b/tests/SimpleInterestCalculatorTest.php
@@ -28,6 +28,13 @@ public function testSimpleInterestAmountFactory() {
      */
     private function assertInterestAmount(SimpleInterestCalculator $interestCalculator) {
         $this->assertEquals(3.75, $interestCalculator->getInterestAmount());
+
+        $this->assertEquals(100, $interestCalculator->getPrincipal());
+        $this->assertEquals(0.0375, $interestCalculator->getAnnualInterestRate());
+        $this->assertEquals(TimeSpan::asDuration(1), $interestCalculator->getTime());
+        $this->assertEquals(1, $interestCalculator->getTimeInYears());
+        $this->assertEquals(12, $interestCalculator->getTimeInMonths());
+        $this->assertEquals(360, $interestCalculator->getTimeInDays());
     }
 
     /**