diff --git a/src/UnitTests/DistributionTests/Discrete/BernoulliTests.cs b/src/UnitTests/DistributionTests/Discrete/BernoulliTests.cs
index d37f1874..293ee42d 100644
--- a/src/UnitTests/DistributionTests/Discrete/BernoulliTests.cs
+++ b/src/UnitTests/DistributionTests/Discrete/BernoulliTests.cs
@@ -78,7 +78,7 @@ namespace MathNet.Numerics.UnitTests.DistributionTests.Discrete
         public void ValidateToString()
         {
             var b = new Bernoulli(0.3);
-            Assert.AreEqual(String.Format("Bernoulli(P = {0})", b.P), b.ToString());
+            Assert.AreEqual("Bernoulli(p = 0.3)", b.ToString());
         }
 
         /// <summary>
diff --git a/src/UnitTests/DistributionTests/Discrete/BinomialTests.cs b/src/UnitTests/DistributionTests/Discrete/BinomialTests.cs
index 61b4302b..12b5f49e 100644
--- a/src/UnitTests/DistributionTests/Discrete/BinomialTests.cs
+++ b/src/UnitTests/DistributionTests/Discrete/BinomialTests.cs
@@ -81,7 +81,7 @@ namespace MathNet.Numerics.UnitTests.DistributionTests.Discrete
         public void ValidateToString()
         {
             var b = new Binomial(0.3, 2);
-            Assert.AreEqual(String.Format("Binomial(Success Probability = {0}, Number of Trials = {1})", b.P, b.N), b.ToString());
+            Assert.AreEqual("Binomial(p = 0.3, n = 2)", b.ToString());
         }
 
         /// <summary>
diff --git a/src/UnitTests/DistributionTests/Discrete/GeometricTests.cs b/src/UnitTests/DistributionTests/Discrete/GeometricTests.cs
index 97a75579..a58e0aae 100644
--- a/src/UnitTests/DistributionTests/Discrete/GeometricTests.cs
+++ b/src/UnitTests/DistributionTests/Discrete/GeometricTests.cs
@@ -78,7 +78,7 @@ namespace MathNet.Numerics.UnitTests.DistributionTests.Discrete
         public void ValidateToString()
         {
             var d = new Geometric(0.3);
-            Assert.AreEqual(String.Format("Geometric(P = {0})", d.P), d.ToString());
+            Assert.AreEqual("Geometric(p = 0.3)", d.ToString());
         }
 
         /// <summary>