diff --git a/changelog/dev-fix-unstable-test-WC_Payments_Incentives_Service_Test b/changelog/dev-fix-unstable-test-WC_Payments_Incentives_Service_Test
new file mode 100644
index 00000000000..49b420d9920
--- /dev/null
+++ b/changelog/dev-fix-unstable-test-WC_Payments_Incentives_Service_Test
@@ -0,0 +1,5 @@
+Significance: patch
+Type: dev
+Comment: Fix the flaky tests due to using PHP time() in production vs test.
+
+
diff --git a/tests/unit/test-class-wc-payments-incentives-service.php b/tests/unit/test-class-wc-payments-incentives-service.php
index 9c8921289ab..9b12a949853 100644
--- a/tests/unit/test-class-wc-payments-incentives-service.php
+++ b/tests/unit/test-class-wc-payments-incentives-service.php
@@ -406,7 +406,9 @@ function ( $value, $expiration ) {
 				$this->assertSame( 'yes', $value );
 
 				// Ensure the cache is set to expire in 90 days - 30 days = 60 days.
-				$this->assertSame( 60 * DAY_IN_SECONDS, $expiration );
+				$expected_expiration = 60 * DAY_IN_SECONDS;
+				// Allowing 5-second difference to avoid flaky tests due to time()  precision.
+				$this->assertLessThanOrEqual( 5, abs( $expected_expiration - $expiration ), 'Expiration time should be within 5 second of expected value' );
 
 				return $value;
 			},