diff --git a/Makefile b/Makefile
index b634289..4bdd0f6 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@ SRCDIR       := ./src
 CACHE_DIR    := ./cache
 NVCC         := nvcc
 
-NVCC_INSTALLED := $(shell command -v nvcc 2> /dev/null)
+NVCC_INSTALLED := $(shell command -v $(NVCC) 2> /dev/null)
 
 MNIST_SRCDIR := $(SRCDIR)/mnist
 CNN_SRCDIR   := $(SRCDIR)/cnn
@@ -68,7 +68,7 @@ cnn: $(BUILDDIR)/cnn-main;
 $(BUILDDIR)/cnn-main: $(CNN_SRCDIR)/main.c $(BUILDDIR)/cnn_train.o $(BUILDDIR)/cnn_cnn.o $(BUILDDIR)/cnn_creation.o $(BUILDDIR)/cnn_initialisation.o $(BUILDDIR)/cnn_make.o $(BUILDDIR)/cnn_neuron_io.o $(BUILDDIR)/cnn_function.o  $(BUILDDIR)/cnn_utils.o $(BUILDDIR)/cnn_free.o $(BUILDDIR)/cnn_convolution.o $(BUILDDIR)/cnn_backpropagation.o $(BUILDDIR)/colors.o $(BUILDDIR)/mnist.o
 	$(CC)     $^ -o $@  $(CFLAGS)
 
-$(BUILDDIR)/cnn-main-cuda: $(BUILDDIR)/cnn_main.o $(BUILDDIR)/cnn_train.o $(BUILDDIR)/cnn_cnn.o $(BUILDDIR)/cnn_creation.o $(BUILDDIR)/cnn_initialisation.o $(BUILDDIR)/cnn_make.o $(BUILDDIR)/cnn_neuron_io.o $(BUILDDIR)/cnn_function.o  $(BUILDDIR)/cnn_utils.o $(BUILDDIR)/cnn_free.o $(BUILDDIR)/cnn_cuda_convolution.o $(BUILDDIR)/cnn_backpropagation.o $(BUILDDIR)/colors.o $(BUILDDIR)/mnist.o
+$(BUILDDIR)/cnn-main-cuda: $(BUILDDIR)/cnn_main.o $(BUILDDIR)/cnn_train.o $(BUILDDIR)/cnn_cnn.o $(BUILDDIR)/cnn_creation.o $(BUILDDIR)/cnn_initialisation.o $(BUILDDIR)/cnn_make.o $(BUILDDIR)/cnn_neuron_io.o $(BUILDDIR)/cnn_function.o  $(BUILDDIR)/cnn_utils.o $(BUILDDIR)/cnn_free.o $(BUILDDIR)/cnn_cuda_convolution.o $(BUILDDIR)/cnn_backpropagation.o $(BUILDDIR)/cuda_utils.o $(BUILDDIR)/colors.o $(BUILDDIR)/mnist.o
 	$(NVCC)  $(NVCCFLAGS)  $^ -o $@
 
 $(BUILDDIR)/cnn_%.o: $(CNN_SRCDIR)/%.c $(CNN_SRCDIR)/include/%.h
@@ -76,7 +76,7 @@ $(BUILDDIR)/cnn_%.o: $(CNN_SRCDIR)/%.c $(CNN_SRCDIR)/include/%.h
 
 $(BUILDDIR)/cnn_cuda_%.o: $(CNN_SRCDIR)/%.cu $(CNN_SRCDIR)/include/%.h
 ifndef NVCC_INSTALLED
-	@echo "nvcc not found, skipping"
+	@echo "$(NVCC) not found, skipping"
 else
 	$(NVCC)  $(NVCCFLAGS)  -c $< -o $@
 endif
@@ -86,12 +86,19 @@ endif
 $(BUILDDIR)/%.o: $(SRCDIR)/%.c $(SRCDIR)/include/%.h
 	$(CC)  -c $< -o $@  $(CFLAGS)
 
+$(BUILDDIR)/cuda_%.o: $(SRCDIR)/%.cu $(SRCDIR)/include/%.h
+ifndef NVCC_INSTALLED
+	@echo "$(NVCC) not found, skipping"
+else
+	$(NVCC)  $(NVCCFLAGS)  -c $< -o $@
+endif	
+
 #
 # Tests
 #
 run-tests: build-tests
-	$(foreach file, $(wildcard $(BUILDDIR)/test-*), $(file);)
 	$(foreach file, $(wildcard $(TEST_SRCDIR)/*.sh), $(file);)
+	@echo "$$(for file in build/test-*; do echo -e \\033[33m#####\\033[0m $$file \\033[33m#####\\033[0m; $$file; done)"
 
 build-tests: prepare-tests $(TESTS_OBJ) $(BUILDDIR)/test-cnn_matrix_multiplication $(BUILDDIR)/test-cnn_convolution
 
@@ -107,9 +114,9 @@ build/test-cnn_%: test/cnn_%.c $(CNN_OBJ) $(BUILDDIR)/colors.o $(BUILDDIR)/mnist
 build/test-mnist_%: test/mnist_%.c $(MNIST_OBJ) $(BUILDDIR)/colors.o
 	$(CC)     $^ -o $@  $(CFLAGS)
 
-$(BUILDDIR)/test-cnn_%: test/cnn_%.cu $(BUILDDIR)/cnn_cuda_%.o $(BUILDDIR)/colors.o $(BUILDDIR)/mnist.o
+$(BUILDDIR)/test-cnn_%: test/cnn_%.cu $(BUILDDIR)/cnn_cuda_%.o $(BUILDDIR)/cuda_utils.o $(BUILDDIR)/colors.o $(BUILDDIR)/mnist.o
 ifndef NVCC_INSTALLED
-	@echo "nvcc not found, skipping"
+	@echo "$(NVCC) not found, skipping"
 else
 	$(NVCC)  $(NVCCFLAGS)  $^ -o $@
 endif
diff --git a/src/cnn/convolution.c b/src/cnn/convolution.c
index 49a4a1c..baf7689 100644
--- a/src/cnn/convolution.c
+++ b/src/cnn/convolution.c
@@ -1,26 +1,44 @@
-/* This file is a copy of src/cnn/convolution.cu */
 #include <stdlib.h>
 #include <stdio.h>
 #include <stdbool.h>
 
 #include "include/struct.h"
+#ifdef __CUDACC__
+    #include "../include/utils.h"
+#else
+bool check_cuda_compatibility() {
+    #ifdef __CUDACC__
+    int nDevices;
+    cudaDeviceProp prop;
+
+    cudaGetDeviceCount(&nDevices);
+    if (nDevices == 0) {
+        printf("Pas d'utilisation du GPU\n\n");
+        return false;
+    }
+
+    printf("GPUs disponibles:\n");
+
+    for (int i=0; i < nDevices; i++) {
+        cudaGetDeviceProperties(&prop, i);
+        printf(" - %s\n", prop.name);
+    }
+
+    cudaGetDeviceProperties(&prop, 0);
+    printf("Utilisation du GPU: " BLUE "%s" RESET " (Compute capability: %d.%d)\n\n", prop.name, prop.major, prop.minor);
+    return true;
+    #else
+    printf("Pas d'utilisation du GPU\n\n");
+    return false;
+    #endif
+}
+#endif
 
 #define BLOCKSIZE_x 16
 #define BLOCKSIZE_y 8
 #define BLOCKSIZE_z 8
 
 
-#ifdef __CUDACC__
-/* CUDA memcheck */
-#define gpuErrchk(ans) { gpuAssert((ans), __FILE__, __LINE__); }
-inline void gpuAssert(cudaError_t code, const char *file, int line, bool abort=true) {
-   if (code != cudaSuccess) {
-      fprintf(stderr,"GPUassert: %s %s %d\n", cudaGetErrorString(code), file, line);
-      if (abort) exit(code);
-   }
-}
-#endif
-
 void make_convolution_cpu(Kernel_cnn* kernel, float*** input, float*** output, int output_dim) {
     // c'est le kernel de input
     // input[kernel->rows][kernel_k_size + output_dim-1][kernel_k_size + output_dim-1]
@@ -45,9 +63,6 @@ void make_convolution_cpu(Kernel_cnn* kernel, float*** input, float*** output, i
 }
 
 #ifdef __CUDACC__
-int i_div_up(int a, int b) { // Partie entière supérieure de a/b
-    return ((a % b) != 0) ? (a / b + 1) : (a / b);
-}
 
 __global__ void make_convolution_kernel(int k_size, int columns, int rows, float*** bias, size_t pitch_bias, float**** w, size_t pitch_w, float*** input, size_t pitch_input, float*** output, size_t pitch_output, int output_dim) {
     // Équivalents respectifs de i, j et k dans la boucle effectuée par le cpu
diff --git a/src/cnn/convolution.cu b/src/cnn/convolution.cu
index b944bcb..293c6a2 100644
--- a/src/cnn/convolution.cu
+++ b/src/cnn/convolution.cu
@@ -3,21 +3,41 @@
 #include <stdbool.h>
 
 #include "include/struct.h"
+#ifdef __CUDACC__
+    #include "../include/utils.h"
+#else
+bool check_cuda_compatibility() {
+    #ifdef __CUDACC__
+    int nDevices;
+    cudaDeviceProp prop;
+
+    cudaGetDeviceCount(&nDevices);
+    if (nDevices == 0) {
+        printf("Pas d'utilisation du GPU\n\n");
+        return false;
+    }
+
+    printf("GPUs disponibles:\n");
+
+    for (int i=0; i < nDevices; i++) {
+        cudaGetDeviceProperties(&prop, i);
+        printf(" - %s\n", prop.name);
+    }
+
+    cudaGetDeviceProperties(&prop, 0);
+    printf("Utilisation du GPU: " BLUE "%s" RESET " (Compute capability: %d.%d)\n\n", prop.name, prop.major, prop.minor);
+    return true;
+    #else
+    printf("Pas d'utilisation du GPU\n\n");
+    return false;
+    #endif
+}
+#endif
 
 #define BLOCKSIZE_x 16
 #define BLOCKSIZE_y 8
 #define BLOCKSIZE_z 8
 
-#ifdef __CUDACC__
-/* CUDA memcheck */
-#define gpuErrchk(ans) { gpuAssert((ans), __FILE__, __LINE__); }
-inline void gpuAssert(cudaError_t code, const char *file, int line, bool abort=true) {
-   if (code != cudaSuccess) {
-      fprintf(stderr,"GPUassert: %s %s %d\n", cudaGetErrorString(code), file, line);
-      if (abort) exit(code);
-   }
-}
-#endif
 
 void make_convolution_cpu(Kernel_cnn* kernel, float*** input, float*** output, int output_dim) {
     // c'est le kernel de input
@@ -43,9 +63,6 @@ void make_convolution_cpu(Kernel_cnn* kernel, float*** input, float*** output, i
 }
 
 #ifdef __CUDACC__
-int i_div_up(int a, int b) { // Partie entière supérieure de a/b
-    return ((a % b) != 0) ? (a / b + 1) : (a / b);
-}
 
 __global__ void make_convolution_kernel(int k_size, int columns, int rows, float*** bias, size_t pitch_bias, float**** w, size_t pitch_w, float*** input, size_t pitch_input, float*** output, size_t pitch_output, int output_dim) {
     // Équivalents respectifs de i, j et k dans la boucle effectuée par le cpu
diff --git a/src/cnn/function.c b/src/cnn/function.c
index b6ec88b..6afda6c 100644
--- a/src/cnn/function.c
+++ b/src/cnn/function.c
@@ -112,10 +112,10 @@ ptr get_function_activation(int activation) {
     } else if (activation == -SIGMOID) {
         return &sigmoid_derivative;
     } else if (activation == SOFTMAX) {
-        printf("Erreur, impossible de renvoyer la fonction softmax");
+        printf("Erreur, impossible de renvoyer la fonction softmax\n");
         return NULL;
     } else if (activation == -SOFTMAX) {
-        printf("Erreur, impossible de renvoyer la dérivée de la fonction softmax");
+        printf("Erreur, impossible de renvoyer la dérivée de la fonction softmax\n");
         return NULL;
     } else if (activation == TANH) {
         return &tanh_;
diff --git a/src/cnn/include/convolution.h b/src/cnn/include/convolution.h
index 99d8e62..4e0eaf8 100644
--- a/src/cnn/include/convolution.h
+++ b/src/cnn/include/convolution.h
@@ -6,11 +6,6 @@
 void make_convolution_cpu(Kernel_cnn* kernel, float*** input, float*** output, int output_dim);
 
 #ifdef __CUDACC__
-/*
-* Partie entière supérieure de a/b
-*/
-int i_div_up(int a, int b);
-
 /*
 * Kernel de la convolution sur carte graphique
 */
diff --git a/src/cnn/include/matrix_multiplication.h b/src/cnn/include/matrix_multiplication.h
index 71c3ca1..dab2f35 100644
--- a/src/cnn/include/matrix_multiplication.h
+++ b/src/cnn/include/matrix_multiplication.h
@@ -7,10 +7,6 @@
 
 
 #ifdef __CUDACC__
-/*
-* Partie entière supérieure de a/b
-*/
-int i_div_up(int a, int b);
 
 /*
 * Fonction exécutée par chaque thread lancé dans `matrix_multiplication_device`
@@ -23,11 +19,6 @@ __global__ void matrix_mul_kernel(float* Md, float* Nd, float* Pd, int n, int p,
 void matrix_multiplication_device(float** m1, float** m2, float** result, int n, int p, int q);
 #endif
 
-/*
-* Vérification de la compatibilité CUDA
-*/
-bool check_cuda_compatibility();
-
 /*
 * Multiplication naïve de matrices sur le CPU (1 seul coeur)
 */
diff --git a/src/cnn/matrix_multiplication.cu b/src/cnn/matrix_multiplication.cu
index 6812c4b..c331343 100644
--- a/src/cnn/matrix_multiplication.cu
+++ b/src/cnn/matrix_multiplication.cu
@@ -2,27 +2,13 @@
 #include <stdio.h>
 #include <stdbool.h>
 
+#include "../include/colors.h"
+#include "../include/utils.h"
+
 #define BLOCKSIZE_x 16
 #define BLOCKSIZE_y 16
 
 #ifdef __CUDACC__
-/* CUDA memcheck */
-#define gpuErrchk(ans) { gpuAssert((ans), __FILE__, __LINE__); }
-inline void gpuAssert(cudaError_t code, const char *file, int line, bool abort=true) {
-   if (code != cudaSuccess) {
-      fprintf(stderr,"GPUassert: %s %s %d\n", cudaGetErrorString(code), file, line);
-      if (abort) exit(code);
-   }
-}
-#endif
-
-
-#ifdef __CUDACC__
-int i_div_up(int a, int b) { // Partie entière supérieure de a/b
-    return ((a % b) != 0) ? (a / b + 1) : (a / b);
-}
-
-
 __global__ void matrix_mul_kernel(float* Md, float* Nd, float* Pd, int n, int p, int q, size_t pitch_m, size_t pitch_n, size_t pitch_p) {
     // Chaque thread calcule toutes les multiplications utilisant l'élément Nd[tx][ty]
     int tx = (blockIdx.x*blockDim.x) + threadIdx.x; // Indice de colonne
@@ -90,34 +76,6 @@ void matrix_multiplication_device(float** m1, float** m2, float** result, int n,
 #endif
 
 
-bool check_cuda_compatibility() {
-    #ifdef __CUDACC__
-    int nDevices;
-    cudaDeviceProp prop;
-
-    cudaGetDeviceCount(&nDevices);
-    if (nDevices == 0) {
-        printf("Pas d'utilisation du GPU\n\n");
-        return false;
-    }
-
-    printf("GPUs disponibles:\n");
-
-    for (int i=0; i < nDevices; i++) {
-        cudaGetDeviceProperties(&prop, i);
-        printf(" - %s\n", prop.name);
-    }
-
-    cudaGetDeviceProperties(&prop, 0);
-    printf("Utilisation du GPU: %s (Compute capability: %d.%d)\n\n", prop.name, prop.major, prop.minor);
-    return true;
-    #else
-    printf("Pas d'utilisation du GPU\n\n");
-    return false;
-    #endif
-}
-
-
 void matrix_multiplication_host(float** m1, float** m2, float** result, int n, int p, int q) {
     for (int i=0; i < n; i++) {
         for (int j=0; j < q; j++) {
diff --git a/src/cnn/neuron_io.c b/src/cnn/neuron_io.c
index e838913..3b65560 100644
--- a/src/cnn/neuron_io.c
+++ b/src/cnn/neuron_io.c
@@ -59,7 +59,7 @@ void write_couche(Network* network, int indice_couche, int type_couche, FILE* pt
     int indice_buffer = 0;
     if (type_couche == 0) { // Cas du CNN
         Kernel_cnn* cnn = kernel->cnn;
-        int output_dim = network->width[indice_couche];
+        int output_dim = network->width[indice_couche+1];
 
         // Écriture du pré-corps
         uint32_t pre_buffer[4];
@@ -75,7 +75,6 @@ void write_couche(Network* network, int indice_couche, int type_couche, FILE* pt
         for (int i=0; i < cnn->columns; i++) {
             for (int j=0; j < output_dim; j++) {
                 for (int k=0; k < output_dim; k++) {
-                    printf("%f\n", cnn->bias[i][j][k]);
                     bufferAdd(cnn->bias[i][j][k]);
                 }
             }
@@ -169,7 +168,7 @@ Network* read_network(char* filename) {
     network->kernel = (Kernel**)malloc(sizeof(Kernel*)*size);
 
     for (int i=0; i < (int)size; i++) {
-        network->kernel[i] = read_kernel(type_couche[i], network->width[i], ptr);
+        network->kernel[i] = read_kernel(type_couche[i], network->width[i+1], ptr);
     }
 
     network->input = (float****)malloc(sizeof(float***)*size);
diff --git a/src/cnn/utils.c b/src/cnn/utils.c
index d02f73b..257766f 100644
--- a/src/cnn/utils.c
+++ b/src/cnn/utils.c
@@ -51,7 +51,7 @@ bool equals_networks(Network* network1, Network* network2) {
             }
         } else {
             // Type CNN
-            output_dim = network1->width[i];
+            output_dim = network1->width[i+1];
             checkEquals(kernel[i]->cnn->k_size, "kernel[i]->k_size", i);
             checkEquals(kernel[i]->cnn->rows, "kernel[i]->rows", i);
             checkEquals(kernel[i]->cnn->columns, "kernel[i]->columns", i);
@@ -152,7 +152,7 @@ Network* copy_network(Network* network) {
             rows = network->kernel[i]->cnn->rows;
             k_size = network->kernel[i]->cnn->k_size;
             columns = network->kernel[i]->cnn->columns;
-            output_dim = network->width[i];
+            output_dim = network->width[i+1];
             
 
             network_cp->kernel[i]->nn = NULL;
diff --git a/src/include/utils.h b/src/include/utils.h
new file mode 100644
index 0000000..2f96a2d
--- /dev/null
+++ b/src/include/utils.h
@@ -0,0 +1,25 @@
+#ifndef DEF_UTILS_CU_H
+#define DEF_UTILS_CU_H
+
+#ifdef __CUDACC__
+/* CUDA memcheck */
+#define gpuErrchk(ans) { gpuAssert((ans), __FILE__, __LINE__); }
+inline void gpuAssert(cudaError_t code, const char *file, int line, bool abort=true) {
+   if (code != cudaSuccess) {
+      fprintf(stderr,"GPUassert: %s %s %d\n", cudaGetErrorString(code), file, line);
+      if (abort) exit(code);
+   }
+}
+#endif
+
+/*
+* Partie entière supérieure de a/b
+*/
+int i_div_up(int a, int b);
+
+/*
+* Vérification de la compatibilité CUDA
+*/
+bool check_cuda_compatibility();
+
+#endif
\ No newline at end of file
diff --git a/src/utils.cu b/src/utils.cu
new file mode 100644
index 0000000..8998d22
--- /dev/null
+++ b/src/utils.cu
@@ -0,0 +1,37 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "include/utils.h"
+#include "include/colors.h"
+
+
+int i_div_up(int a, int b) { // Partie entière supérieure de a/b
+    return ((a % b) != 0) ? (a / b + 1) : (a / b);
+}
+
+bool check_cuda_compatibility() {
+    #ifdef __CUDACC__
+    int nDevices;
+    cudaDeviceProp prop;
+
+    cudaGetDeviceCount(&nDevices);
+    if (nDevices == 0) {
+        printf("Pas d'utilisation du GPU\n\n");
+        return false;
+    }
+
+    printf("GPUs disponibles:\n");
+
+    for (int i=0; i < nDevices; i++) {
+        cudaGetDeviceProperties(&prop, i);
+        printf(" - %s\n", prop.name);
+    }
+
+    cudaGetDeviceProperties(&prop, 0);
+    printf("Utilisation du GPU: " BLUE "%s" RESET " (Compute capability: %d.%d)\n\n", prop.name, prop.major, prop.minor);
+    return true;
+    #else
+    printf("Pas d'utilisation du GPU\n\n");
+    return false;
+    #endif
+}
\ No newline at end of file
diff --git a/test/cnn_convolution.cu b/test/cnn_convolution.cu
index 28c863d..d290adc 100644
--- a/test/cnn_convolution.cu
+++ b/test/cnn_convolution.cu
@@ -7,6 +7,8 @@
 
 #include "../src/cnn/include/convolution.h"
 #include "../src/cnn/include/struct.h"
+#include "../src/include/colors.h"
+#include "../src/include/utils.h"
 
 
 float random_float(float low, float high) {
@@ -75,13 +77,12 @@ void free_matrix(float*** matrix, int n, int p) {
     free(matrix);
 }
 
-
 bool check_matrices_equality(float*** m1, float*** m2, int n, int p, int q, int acceptation) {
     for (int i=0; i < n; i++) {
         for (int j=0; j < p; j++) {
             for (int k=0; k < q; k++) {
                 if (fabs(m1[i][j][k] - m2[i][j][k]) > 0.01*acceptation) {
-                    printf("diff %d %d %d: %f val: %f et %f\n", i, j, k, fabs(m1[i][j][k] - m2[i][j][k]), m1[i][j][k], m2[i][j][k]);
+                    printf(RED "diff %d %d %d: %f val: %f et %f\n" RESET, i, j, k, fabs(m1[i][j][k] - m2[i][j][k]), m1[i][j][k], m2[i][j][k]);
                     return false;
                 }
             }
@@ -144,7 +145,7 @@ void run_convolution_test(int input_dim, int output_dim, int rows, int columns)
     if (!check_matrices_equality(output_gpu, output_cpu, kernel->columns, output_dim, output_dim, kernel->k_size)) {// TODO: change acceptation
         exit(1);
     }
-    printf("OK\n");
+    printf(GREEN "OK\n" RESET);
 
     free_matrix(kernel->bias, kernel->columns, output_dim);
     free_matrix(kernel->d_bias, kernel->columns, output_dim);
@@ -163,11 +164,19 @@ void run_convolution_test(int input_dim, int output_dim, int rows, int columns)
 
 
 int main() {
+    printf("Checking CUDA compatibility.\n");
+    bool cuda_compatible = check_cuda_compatibility();
+    if (!cuda_compatible) {
+        printf(RED "CUDA not compatible, skipping tests.\n" RESET);
+        return 0;
+    }
+    printf(GREEN "OK\n" RESET);
+    
     srand(time(NULL));
 
     run_convolution_test(20, 15, 30, 40);
     run_convolution_test(30, 25, 40, 50);
-    run_convolution_test(200, 10, 40, 50);
+    run_convolution_test(250, 200, 3, 3);
     
     return 0;
 }
\ No newline at end of file
diff --git a/test/cnn_matrix_multiplication.cu b/test/cnn_matrix_multiplication.cu
index 3f7d875..2b8825c 100644
--- a/test/cnn_matrix_multiplication.cu
+++ b/test/cnn_matrix_multiplication.cu
@@ -5,6 +5,8 @@
 #include <time.h>
 
 #include "../src/cnn/include/matrix_multiplication.h"
+#include "../src/include/colors.h"
+#include "../src/include/utils.h"
 
 
 float random_float(float low, float high) {
@@ -76,30 +78,27 @@ void run_matrices_test(int n, int p, int q) {
     float** result_gpu = create_empty_matrix(n, q);
     float** result_cpu = create_empty_matrix(n, q);
 
-    printf("(%d,%d)x(%d,%d) Computing on GPU.\n", n, p, p, q);
+    printf("(%d,%d)x(%d,%d) Data generation complete.\n", n, p, p, q);
     start = clock();
     matrix_multiplication_device(matrix1, matrix2, result_gpu, n, p, q);
     end = clock();
 
     cpu_time_used = ((double) (end - start)) / CLOCKS_PER_SEC;
     printf("(%d,%d)x(%d,%d) Time used for GPU: %lf seconds\n", n, p, p, q, cpu_time_used);
-    printf("OK\n");
     
-    printf("(%d,%d)x(%d,%d) Computing on CPU.\n", n, p, p, q);
     start = clock();
     matrix_multiplication_host(matrix1, matrix2, result_cpu, n, p, q);
     end = clock();
 
     gpu_time_used = ((double) (end - start)) / CLOCKS_PER_SEC;
     printf("(%d,%d)x(%d,%d) Time used for CPU: %lf seconds\n", n, p, p, q, gpu_time_used);
-    printf("OK\n");
 
     // Vérification de l'égalité des matrices
     printf("(%d,%d)x(%d,%d) Checking equality.\n", n, p, p, q);
     if (!check_matrices_equality(result_gpu, result_cpu, n, q, p)) {
         exit(1);
     }
-    printf("OK\n");
+    printf(GREEN "OK\n" RESET);
 
     // On libère l'espace mémoire alloué
     for (int i=0; i < n; i++) {
@@ -128,10 +127,10 @@ int main() {
     printf("Checking CUDA compatibility.\n");
     bool cuda_compatible = check_cuda_compatibility();
     if (!cuda_compatible) {
-        printf("CUDA not compatible, skipping tests.\n");
+        printf(RED "CUDA not compatible, skipping tests.\n" RESET);
         return 0;
     }
-    printf("OK\n");
+    printf(GREEN "OK\n" RESET);
 
     srand(time(NULL));
     run_matrices_test(200, 1000, 200);
diff --git a/test/cnn_neuron_io.c b/test/cnn_neuron_io.c
index 78be082..3588e16 100644
--- a/test/cnn_neuron_io.c
+++ b/test/cnn_neuron_io.c
@@ -7,27 +7,28 @@
 #include "../src/cnn/include/neuron_io.h"
 #include "../src/cnn/include/creation.h"
 #include "../src/cnn/include/utils.h"
+#include "../src/include/colors.h"
 
 
 int main() {
     printf("Création du réseau\n");
     Network* network = create_network_lenet5(0, 0, 3, 2, 32, 1);
-    printf("OK\n");
+    printf(GREEN "OK\n" RESET);
 
     printf("Écriture du réseau\n");
-    write_network(".test-cache/cnn_neuron_io.bin", network);
-    printf("OK\n");
+    write_network((char*)".test-cache/cnn_neuron_io.bin", network);
+    printf(GREEN "OK\n" RESET);
 
     printf("Vérification de l'accès en lecture\n");
-    Network* network2 = read_network(".test-cache/cnn_neuron_io.bin");
-    printf("OK\n");
+    Network* network2 = read_network((char*)".test-cache/cnn_neuron_io.bin");
+    printf(GREEN "OK\n" RESET);
 
     printf("Vérification de l'égalité des réseaux\n");
     if (! equals_networks(network, network2)) {
-        printf_error("Les deux réseaux obtenus ne sont pas égaux.\n");
+        printf_error(RED "Les deux réseaux obtenus ne sont pas égaux.\n" RESET);
         exit(1);
     }
-    printf("OK\n");
+    printf(GREEN "OK\n" RESET);
 
     return 0;
 }
\ No newline at end of file
diff --git a/test/cnn_utils.c b/test/cnn_utils.c
index d08635a..dce732d 100644
--- a/test/cnn_utils.c
+++ b/test/cnn_utils.c
@@ -4,22 +4,23 @@
 #include "../src/include/colors.h"
 #include "../src/cnn/include/creation.h"
 #include "../src/cnn/include/utils.h"
+#include "../src/include/colors.h"
 
 int main() {
     printf("Création du réseau\n");
     Network* network = create_network_lenet5(0, 0, 3, 2, 32, 1);
-    printf("OK\n");
+    printf(GREEN "OK\n" RESET);
 
     printf("Copie du réseau\n");
     Network* network_cp = copy_network(network);
-    printf("OK\n");
+    printf(GREEN "OK\n" RESET);
 
     printf("Vérification de l'égalité des réseaux\n");
     if (! equals_networks(network, network_cp)) {
-        printf_error("Les deux réseaux obtenus ne sont pas égaux.\n");
+        printf_error(RED "Les deux réseaux obtenus ne sont pas égaux.\n" RESET);
         exit(1);
     }
-    printf("OK\n");
+    printf(GREEN "OK\n" RESET);
 
     return 0;
 }
\ No newline at end of file
diff --git a/test/mnist_data_io.c b/test/mnist_data_io.c
index d413b63..b74ccb1 100644
--- a/test/mnist_data_io.c
+++ b/test/mnist_data_io.c
@@ -3,6 +3,7 @@
 #include <inttypes.h>
 
 #include "../src/mnist/include/mnist.h"
+#include "../src/include/colors.h"
 
 
 void read_test(int nb_images, int width, int height, int*** images, unsigned int* labels) {
@@ -10,7 +11,7 @@ void read_test(int nb_images, int width, int height, int*** images, unsigned int
     for (int i=0; i < nb_images; i++) {
         (void)labels[i];
     }
-    printf("\tOK\n");
+    printf(GREEN "\tOK\n" RESET);
     printf("\tLecture des images\n");
     for (int i=0; i < nb_images; i++) {
         for (int j=0; j < height; j++) {
@@ -19,12 +20,12 @@ void read_test(int nb_images, int width, int height, int*** images, unsigned int
             }
         }
     }
-    printf("\tOK\n");
+    printf(GREEN "\tOK\n" RESET);
 }
 
 int main() {
-    char* image_file = "data/mnist/t10k-images-idx3-ubyte";
-    char* labels_file = "data/mnist/t10k-labels-idx1-ubyte";
+    char* image_file = (char*)"data/mnist/t10k-images-idx3-ubyte";
+    char* labels_file = (char*)"data/mnist/t10k-labels-idx1-ubyte";
     printf("Chargement des paramètres\n");
 
     int* parameters = read_mnist_images_parameters(image_file);
@@ -32,21 +33,21 @@ int main() {
     int height = parameters[1];
     int width = parameters[2];
 
-    printf("OK\n");
+    printf(GREEN "OK\n" RESET);
     printf("Chargement des images\n");
 
     int*** images = read_mnist_images(image_file);
 
-    printf("OK\n");
+    printf(GREEN "OK\n" RESET);
     printf("Chargement des labels\n");
 
     unsigned int* labels = read_mnist_labels(labels_file);
 
-    printf("OK\n");
+    printf(GREEN "OK\n" RESET);
     printf("Vérification de l'accès en lecture\n");
 
     read_test(nb_images, width, height, images, labels);
 
-    printf("OK\n");
+    printf(GREEN "OK\n" RESET);
     return 0;
 }
\ No newline at end of file
diff --git a/test/mnist_neural_network.c b/test/mnist_neural_network.c
index 334e902..61ed195 100644
--- a/test/mnist_neural_network.c
+++ b/test/mnist_neural_network.c
@@ -5,17 +5,18 @@
 
 #include "../src/mnist/include/neural_network.h"
 #include "../src/mnist/include/neuron_io.h"
+#include "../src/include/colors.h"
 
 int main() {
     printf("Création du réseau\n");
     Network* network = (Network*)malloc(sizeof(Network));
     int tab[5] = {30, 25, 20, 15, 10};
     network_creation(network, tab, 5);
-    printf("OK\n");
+    printf(GREEN "OK\n" RESET);
 
     printf("Initialisation du réseau\n");
     network_initialisation(network);
-    printf("OK\n");
+    printf(GREEN "OK\n" RESET);
 
     deletion_of_network(network);
     return 0;
diff --git a/test/mnist_neuron_io.c b/test/mnist_neuron_io.c
index b36702d..fee7dfe 100644
--- a/test/mnist_neuron_io.c
+++ b/test/mnist_neuron_io.c
@@ -6,6 +6,7 @@
 
 #include "../src/mnist/include/neuron_io.h"
 #include "../src/mnist/include/neural_network.h"
+#include "../src/include/colors.h"
 
 
 Neuron* creer_neuron(int nb_sortants) {
@@ -63,20 +64,20 @@ Network* create_network(int nb_layers, int nb_max_neurons, int nb_min_neurons) {
 int main() {
     printf("Création du réseau\n");
     Network* network = create_network(5, 300, 10);
-    printf("OK\n");
+    printf(GREEN "OK\n" RESET);
 
     printf("Écriture du réseau\n");
-    write_network(".test-cache/neuron_io.bin", network);
-    printf("OK\n");
+    write_network((char*)".test-cache/neuron_io.bin", network);
+    printf(GREEN "OK\n" RESET);
 
     printf("Vérification de l'accès en lecture\n");
-    Network* network2 = read_network(".test-cache/neuron_io.bin");
-    printf("OK\n");
+    Network* network2 = read_network((char*)".test-cache/neuron_io.bin");
+    printf(GREEN "OK\n" RESET);
 
     printf("Suppression des réseaux\n");
     deletion_of_network(network);
     deletion_of_network(network2);
-    printf("OK\n");
+    printf(GREEN "OK\n" RESET);
 
     return 0;
 }
\ No newline at end of file
diff --git a/test/mnist_utils.sh b/test/mnist_utils.sh
index 5a801b2..c3d4b60 100755
--- a/test/mnist_utils.sh
+++ b/test/mnist_utils.sh
@@ -7,17 +7,17 @@ make $OUT/mnist-utils
 
 echo "Compte des labels"
 "$OUT/mnist-utils" count-labels -l data/mnist/t10k-labels-idx1-ubyte
-echo "OK"
+echo -e "\033[32mOK\033[0m"
 
 echo "Création du réseau"
 mkdir -p .test-cache
 "$OUT/mnist-utils" creer-reseau -n 3 -o .test-cache/reseau.bin
-echo "OK"
+echo -e "\033[32mOK\033[0m"
 
 echo "Affichage poids"
 "$OUT/mnist-utils" print-poids -r .test-cache/reseau.bin > /dev/null
-echo "OK"
+echo -e "\033[32mOK\033[0m"
 
 echo "Affichage biais"
 "$OUT/mnist-utils" print-biais -r .test-cache/reseau.bin > /dev/null
-echo "OK"
+echo -e "\033[32mOK\033[0m"