diff --git a/test/Primitively.IntegrationTests/NumericTests/Double/KelvinTests.cs b/test/Primitively.IntegrationTests/NumericTests/Double/KelvinTests.cs
index dcc0062..d0e5666 100644
--- a/test/Primitively.IntegrationTests/NumericTests/Double/KelvinTests.cs
+++ b/test/Primitively.IntegrationTests/NumericTests/Double/KelvinTests.cs
@@ -1,8 +1,8 @@
-using Acme.TestLib2.Single;
+using Acme.TestLib2.Double;
 using FluentAssertions;
 using Xunit;
 
-namespace Primitively.IntegrationTests.NumericTests.Single;
+namespace Primitively.IntegrationTests.NumericTests.Double;
 
 public class KelvinTests
 {
@@ -67,9 +67,9 @@ public void Minimum_Sut_Scale_Converts_To_Minimum_In_Other_Scales()
         var kelvin = new Kelvin(Kelvin.Minimum);
 
         // Act
-        float celsius = (Celsius)kelvin;
-        float fahrenheit = (Fahrenheit)kelvin;
-        float rankine = (Rankine)kelvin;
+        double celsius = (Celsius)kelvin;
+        double fahrenheit = (Fahrenheit)kelvin;
+        double rankine = (Rankine)kelvin;
 
         // Assert
         celsius.Should().Be(Celsius.Minimum);
diff --git a/test/Primitively.IntegrationTests/NumericTests/Double/RankineTests.cs b/test/Primitively.IntegrationTests/NumericTests/Double/RankineTests.cs
index da330b9..298cf41 100644
--- a/test/Primitively.IntegrationTests/NumericTests/Double/RankineTests.cs
+++ b/test/Primitively.IntegrationTests/NumericTests/Double/RankineTests.cs
@@ -1,8 +1,8 @@
-using Acme.TestLib2.Single;
+using Acme.TestLib2.Double;
 using FluentAssertions;
 using Xunit;
 
-namespace Primitively.IntegrationTests.NumericTests.Single;
+namespace Primitively.IntegrationTests.NumericTests.Double;
 
 public class RankineTests
 {
@@ -67,9 +67,9 @@ public void Minimum_Sut_Scale_Converts_To_Minimum_In_Other_Scales()
         var rankine = new Rankine(Rankine.Minimum);
 
         // Act
-        float celsius = (Celsius)rankine;
-        float fahrenheit = (Fahrenheit)rankine;
-        float kelvin = (Kelvin)rankine;
+        double celsius = (Celsius)rankine;
+        double fahrenheit = (Fahrenheit)rankine;
+        double kelvin = (Kelvin)rankine;
 
         // Assert
         celsius.Should().Be(Celsius.Minimum);
diff --git a/test/Primitively.IntegrationTests/NumericTests/Single/KelvinTests.cs b/test/Primitively.IntegrationTests/NumericTests/Single/KelvinTests.cs
index d0e5666..6e27634 100644
--- a/test/Primitively.IntegrationTests/NumericTests/Single/KelvinTests.cs
+++ b/test/Primitively.IntegrationTests/NumericTests/Single/KelvinTests.cs
@@ -1,8 +1,8 @@
-using Acme.TestLib2.Double;
+using Acme.TestLib2.Single;
 using FluentAssertions;
 using Xunit;
 
-namespace Primitively.IntegrationTests.NumericTests.Double;
+namespace Primitively.IntegrationTests.NumericTests.Single;
 
 public class KelvinTests
 {
diff --git a/test/Primitively.IntegrationTests/NumericTests/Single/RankineTests.cs b/test/Primitively.IntegrationTests/NumericTests/Single/RankineTests.cs
index 298cf41..6d19e0f 100644
--- a/test/Primitively.IntegrationTests/NumericTests/Single/RankineTests.cs
+++ b/test/Primitively.IntegrationTests/NumericTests/Single/RankineTests.cs
@@ -1,8 +1,8 @@
-using Acme.TestLib2.Double;
+using Acme.TestLib2.Single;
 using FluentAssertions;
 using Xunit;
 
-namespace Primitively.IntegrationTests.NumericTests.Double;
+namespace Primitively.IntegrationTests.NumericTests.Single;
 
 public class RankineTests
 {