diff --git a/test/src/test_mat2.h b/test/src/test_mat2.h
index 69ee403..6fa622a 100644
--- a/test/src/test_mat2.h
+++ b/test/src/test_mat2.h
@@ -81,7 +81,7 @@ TEST_IMPL(GLM_PREFIX, mat2_identity) {
 }
 
 TEST_IMPL(GLM_PREFIX, mat2_identity_array) {
-  int i, count;
+  size_t i, count;
   mat2 matrices[4] = {
     A_MATRIX2x2,
     A_MATRIX2x2,
diff --git a/test/src/test_mat3.h b/test/src/test_mat3.h
index 92fe7eb..2f151cd 100644
--- a/test/src/test_mat3.h
+++ b/test/src/test_mat3.h
@@ -36,7 +36,7 @@ TEST_IMPL(GLM_PREFIX, mat3_identity) {
 }
 
 TEST_IMPL(GLM_PREFIX, mat3_identity_array) {
-  int i, count;
+  size_t i, count;
   mat3 matrices[4] = {
     A_MATRIX,
     A_MATRIX,
diff --git a/test/src/test_mat4.h b/test/src/test_mat4.h
index 19cfc51..16d80bb 100644
--- a/test/src/test_mat4.h
+++ b/test/src/test_mat4.h
@@ -48,7 +48,7 @@ TEST_IMPL(GLM_PREFIX, mat4_identity) {
 }
 
 TEST_IMPL(GLM_PREFIX, mat4_identity_array) {
-  int i, count;
+  size_t i, count;
   mat4 matrices[4] = {
     A_MATRIX,
     A_MATRIX,
diff --git a/test/src/test_quat.h b/test/src/test_quat.h
index ab85b19..338f396 100644
--- a/test/src/test_quat.h
+++ b/test/src/test_quat.h
@@ -56,7 +56,7 @@ TEST_IMPL(GLM_PREFIX, quat_identity) {
 }
 
 TEST_IMPL(GLM_PREFIX, quat_identity_array) {
-  int i, count;
+  size_t i, count;
   versor quats[4] = {
     {1.0f, 2.0f, 3.0f, 4.0f},
     {1.0f, 2.0f, 3.0f, 4.0f},