diff --git a/src/Math-Tests-Polynomials/PMPolynomialTest.class.st b/src/Math-Tests-Polynomials/PMPolynomialTest.class.st
index ac815685..c74a080d 100644
--- a/src/Math-Tests-Polynomials/PMPolynomialTest.class.st
+++ b/src/Math-Tests-Polynomials/PMPolynomialTest.class.st
@@ -15,13 +15,12 @@ PMPolynomialTest >> testIsZero [
 
 { #category : #'testing - addition' }
 PMPolynomialTest >> testPolynomialAddition [
-	| polynomial |
-	polynomial := (PMPolynomial coefficients: #(2 -3 1))
-		+ (PMPolynomial coefficients: #(-3 7 2 1)).
-	self assert: (polynomial at: 0) equals: -1.
-	self assert: (polynomial at: 1) equals: 4.
-	self assert: (polynomial at: 2) equals: 3.
-	self assert: (polynomial at: 3) equals: 1.
+
+	| polynomial expected |
+	polynomial := (PMPolynomial coefficients: #( 2 -3 1 ))
+	              + (PMPolynomial coefficients: #( -3 7 2 1 )).
+	expected := PMPolynomial coefficients: #( -1 4 3 1 ).
+	self assert: polynomial equals: expected.
 	self assert: (polynomial at: 4) equals: 0
 ]