diff --git a/test/gtx/gtx_intersect.cpp b/test/gtx/gtx_intersect.cpp
index 10217cd0..83401913 100644
--- a/test/gtx/gtx_intersect.cpp
+++ b/test/gtx/gtx_intersect.cpp
@@ -57,12 +57,26 @@ int test_LineLineProper() {
 	return Error;
 }
 
+int test_overlapSegment() {
+	int Error(0);
+
+	Error += !overlapSegment(vec2(0, 1), vec2(2, 1), vec2(1, 1), vec2(1, 2)) ? 0 : 1;
+	Error += !overlapSegment(vec2(0, 1), vec2(2, 1), vec2(1, 2), vec2(1, 1)) ? 0 : 1;
+	Error += !overlapSegment(vec2(0, 0), vec2(0, 1), vec2(0, 1), vec2(0, 2)) ? 0 : 1;
+	Error += overlapSegment(vec2(0, 0), vec2(0, 1), vec2(0, 0.5), vec2(0, 2)) ? 0 : 1;
+	Error += overlapSegment(vec2(0.5, 1), vec2(2, 2.5), vec2(1, 1.5), vec2(1.5, 2)) ? 0 : 1;
+	Error += !overlapSegment(vec2(0.5, 1), vec2(2, 2.5), vec2(1, 1.51), vec2(1.5, 2)) ? 0 : 1;
+
+	return Error;
+}
+
 int main()
 {
 	int Error(0);
 
 	Error += test_LineLine();
 	Error += test_LineLineProper();
+	Error += test_overlapSegment();
 
 	return Error;
 }
diff --git a/test/gtx/gtx_vector_query.cpp b/test/gtx/gtx_vector_query.cpp
index 7668c152..2d74ed8b 100644
--- a/test/gtx/gtx_vector_query.cpp
+++ b/test/gtx/gtx_vector_query.cpp
@@ -55,6 +55,16 @@ int test_areCollinear()
 		Error += TestA ? 0 : 1;
 	}
 
+	{
+		bool TestA = glm::areCollinear(glm::vec2(0, 0), glm::vec2(1, 1), glm::vec2(2, 2));
+		Error += TestA ? 0 : 1;
+	}
+
+	{
+		bool TestA = glm::areCollinear(glm::vec2(0, 0), glm::vec2(1, 1), glm::vec2(4, 2));
+		Error += !TestA ? 0 : 1;
+	}
+
 	return Error;
 }