diff --git a/Test/ConvertColormode.cpp b/Test/ConvertColormode.cpp
index d4718cc..7709923 100644
--- a/Test/ConvertColormode.cpp
+++ b/Test/ConvertColormode.cpp
@@ -3,7 +3,7 @@
 #include "Catch2.h"
 
 using namespace Leonetienne::BmpPP;
-using namespace Eule;
+using namespace Leonetienne::Eule;
 
 // Tests converting between color modes works
 TEST_CASE(__FILE__"/Converting_between_color_modes_works", "[Conversion]")
diff --git a/Test/Crop.cpp b/Test/Crop.cpp
index f7d5783..dbe8adb 100644
--- a/Test/Crop.cpp
+++ b/Test/Crop.cpp
@@ -3,7 +3,7 @@
 #include "Catch2.h"
 
 using namespace Leonetienne::BmpPP;
-using namespace Eule;
+using namespace Leonetienne::Eule;
 
 // Tests that cropping produces the correct result
 TEST_CASE(__FILE__"/HappyPath", "[Cropping]")
diff --git a/Test/FillChannel.cpp b/Test/FillChannel.cpp
index 402600b..ce27bbb 100644
--- a/Test/FillChannel.cpp
+++ b/Test/FillChannel.cpp
@@ -4,7 +4,7 @@
 #include <Eule/Math.h>
 
 using namespace Leonetienne::BmpPP;
-using namespace Eule;
+using namespace Leonetienne::Eule;
 
 #define IMSIZE Vector2i(800, 600)
 
diff --git a/Test/MirrorHorizontally.cpp b/Test/MirrorHorizontally.cpp
index f0904df..c7ca4c7 100644
--- a/Test/MirrorHorizontally.cpp
+++ b/Test/MirrorHorizontally.cpp
@@ -3,7 +3,7 @@
 #include "Catch2.h"
 
 using namespace Leonetienne::BmpPP;
-using namespace Eule;
+using namespace Leonetienne::Eule;
 
 // Tests the mirror horizontal function against reference images
 TEST_CASE(__FILE__"/Mirroring produces the correct results", "[Mirroring][MirrorHorizontally]")
diff --git a/Test/MirrorVertically.cpp b/Test/MirrorVertically.cpp
index 12d6f85..b90b308 100644
--- a/Test/MirrorVertically.cpp
+++ b/Test/MirrorVertically.cpp
@@ -3,7 +3,7 @@
 #include "Catch2.h"
 
 using namespace Leonetienne::BmpPP;
-using namespace Eule;
+using namespace Leonetienne::Eule;
 
 // Tests the mirror vertical function against reference images
 TEST_CASE(__FILE__"/Mirroring produces the correct results", "[Mirroring][MirrorVertically]")
diff --git a/Test/OperatorEquals.cpp b/Test/OperatorEquals.cpp
index 151dcae..e7b3cd2 100644
--- a/Test/OperatorEquals.cpp
+++ b/Test/OperatorEquals.cpp
@@ -3,7 +3,7 @@
 #include "Catch2.h"
 
 using namespace Leonetienne::BmpPP;
-using namespace Eule;
+using namespace Leonetienne::Eule;
 
 // Don't have to test operator not equal, because it just returns the opposite of this
 
diff --git a/Test/Read.cpp b/Test/Read.cpp
index 08a0e21..e164af0 100644
--- a/Test/Read.cpp
+++ b/Test/Read.cpp
@@ -4,7 +4,7 @@
 #include <Eule/Math.h>
 
 using namespace Leonetienne::BmpPP;
-using namespace Eule;
+using namespace Leonetienne::Eule;
 
 #define IMSIZE Vector2i(800, 600)
 
diff --git a/Test/Rotate.cpp b/Test/Rotate.cpp
index 9b664bb..22101b6 100644
--- a/Test/Rotate.cpp
+++ b/Test/Rotate.cpp
@@ -3,7 +3,7 @@
 #include "Catch2.h"
 
 using namespace Leonetienne::BmpPP;
-using namespace Eule;
+using namespace Leonetienne::Eule;
 
 // Tests that rotating works
 TEST_CASE(__FILE__"/Rotating_produces_the_correct_results", "[Rotate]")
diff --git a/Test/SwapChannels.cpp b/Test/SwapChannels.cpp
index 5dc98f2..cc59134 100644
--- a/Test/SwapChannels.cpp
+++ b/Test/SwapChannels.cpp
@@ -3,7 +3,7 @@
 #include "Catch2.h"
 
 using namespace Leonetienne::BmpPP;
-using namespace Eule;
+using namespace Leonetienne::Eule;
 
 // Tests that swapping channels works
 TEST_CASE(__FILE__"/SwappingChannelsWorks", "[SwapChannels]")
diff --git a/Test/Uninitialized.cpp b/Test/Uninitialized.cpp
index 444d8d1..b081d12 100644
--- a/Test/Uninitialized.cpp
+++ b/Test/Uninitialized.cpp
@@ -3,7 +3,7 @@
 #include "Catch2.h"
 
 using namespace Leonetienne::BmpPP;
-using namespace Eule;
+using namespace Leonetienne::Eule;
 
 // Tests that get information or modifying on an uninitialized image results in a runtime error
 TEST_CASE(__FILE__"/RuntimeErrorOnUninitialized", "[Uninitialized]")
diff --git a/Test/Write.cpp b/Test/Write.cpp
index 86537ed..6db14e1 100644
--- a/Test/Write.cpp
+++ b/Test/Write.cpp
@@ -4,7 +4,7 @@
 #include <Eule/Math.h>
 
 using namespace Leonetienne::BmpPP;
-using namespace Eule;
+using namespace Leonetienne::Eule;
 
 #define IMSIZE Vector2i(800, 600)