diff --git a/test/src/test_vec4.h b/test/src/test_vec4.h
index cb34543..e7ad793 100644
--- a/test/src/test_vec4.h
+++ b/test/src/test_vec4.h
@@ -1490,6 +1490,22 @@ TEST_IMPL(GLM_PREFIX, vec4_fract) {
   TEST_SUCCESS
 }
 
+TEST_IMPL(GLM_PREFIX, vec4_floor) {
+  vec4 v1 = {2.104f, 3.012f, 4.10f, 4.10f};
+  vec4 v2 = {12.35f, 31.140f, 43.502f, 43.502f};
+  vec4 v3, v4;
+  vec4 v5 = {2.0f, 3.0f, 4.0f, 4.0f};
+  vec4 v6 = {12.0f, 31.0f, 43.0f, 43.0f};
+
+  GLM(vec4_floor)(v1, v3);
+  GLM(vec4_floor)(v2, v4);
+
+  ASSERTIFY(test_assert_vec4_eq(v3, v5))
+  ASSERTIFY(test_assert_vec4_eq(v4, v6))
+
+  TEST_SUCCESS
+}
+
 TEST_IMPL(GLM_PREFIX, vec4_hadd) {
   vec4  v1 = {2.0f, 3.0f, 4.0f, 4.0f}, v2 = {12.0f, 31.0f, 43.0f, 43.0f};
   float r1, r2, r3, r4;
diff --git a/test/tests.h b/test/tests.h
index cc99ffd..33ec303 100644
--- a/test/tests.h
+++ b/test/tests.h
@@ -863,6 +863,7 @@ TEST_DECLARE(glm_vec4_isvalid)
 TEST_DECLARE(glm_vec4_sign)
 TEST_DECLARE(glm_vec4_abs)
 TEST_DECLARE(glm_vec4_fract)
+TEST_DECLARE(glm_vec4_floor)
 TEST_DECLARE(glm_vec4_hadd)
 TEST_DECLARE(glm_vec4_sqrt)
 TEST_DECLARE(glm_vec4_make)
@@ -937,6 +938,7 @@ TEST_DECLARE(glmc_vec4_isvalid)
 TEST_DECLARE(glmc_vec4_sign)
 TEST_DECLARE(glmc_vec4_abs)
 TEST_DECLARE(glmc_vec4_fract)
+TEST_DECLARE(glmc_vec4_floor)
 TEST_DECLARE(glmc_vec4_hadd)
 TEST_DECLARE(glmc_vec4_sqrt)
 TEST_DECLARE(glmc_vec4_make)
@@ -2048,6 +2050,7 @@ TEST_LIST {
   TEST_ENTRY(glm_vec4_sign)
   TEST_ENTRY(glm_vec4_abs)
   TEST_ENTRY(glm_vec4_fract)
+  TEST_ENTRY(glm_vec4_floor)
   TEST_ENTRY(glm_vec4_hadd)
   TEST_ENTRY(glm_vec4_sqrt)
   TEST_ENTRY(glm_vec4_make)
@@ -2122,6 +2125,7 @@ TEST_LIST {
   TEST_ENTRY(glmc_vec4_sign)
   TEST_ENTRY(glmc_vec4_abs)
   TEST_ENTRY(glmc_vec4_fract)
+  TEST_ENTRY(glmc_vec4_floor)
   TEST_ENTRY(glmc_vec4_hadd)
   TEST_ENTRY(glmc_vec4_sqrt)
   TEST_ENTRY(glmc_vec4_make)