diff --git a/tests/test_circular_q.cpp b/tests/test_circular_q.cpp
index fd91503a..5f1a0e57 100644
--- a/tests/test_circular_q.cpp
+++ b/tests/test_circular_q.cpp
@@ -2,12 +2,14 @@
 #include "spdlog/details/circular_q.h"
 
 using q_type = spdlog::details::circular_q<size_t>;
+
 TEST_CASE("test_size", "[circular_q]")
 {
     const size_t q_size = 4;
     q_type q(q_size);
     REQUIRE(q.size() == 0);
     REQUIRE(q.empty() == true);
+    REQUIRE(q.full() == false);
     for (size_t i = 0; i < q_size; i++)
     {
         q.push_back(std::move(i));
@@ -49,7 +51,75 @@ TEST_CASE("test_rolling", "[circular_q]")
 
 TEST_CASE("test_empty", "[circular_q]")
 {
-    q_type q(0);
-    q.push_back(1);
-    REQUIRE(q.empty());
-}
\ No newline at end of file
+    q_type q1(0);
+    REQUIRE(q1.empty());
+    q1.push_back(1);
+    REQUIRE(q1.empty());
+
+    q_type q2(1);
+    REQUIRE(q2.empty());
+    q2.push_back(1);
+    REQUIRE(!q2.empty());
+    q2.pop_front();
+    REQUIRE(q2.empty());
+}
+
+TEST_CASE("test_full", "[circular_q]")
+{
+    q_type q1(0);
+    REQUIRE(q1.full());
+
+    q_type q2(2);
+    REQUIRE(!q2.full());
+
+    q2.push_back(1);
+    REQUIRE(!q2.full());
+
+    q2.push_back(2);
+    REQUIRE(q2.full());
+}
+
+
+TEST_CASE("test_operator[]", "[circular_q]")
+{
+    q_type q(2);
+    q.push_back(100);
+    q.push_back(200);
+    REQUIRE(q[0] == 100);
+    REQUIRE(q[1] == 200);
+}
+
+
+TEST_CASE("test_operator=", "[circular_q]")
+{
+    q_type q1(2);
+    q1.push_back(100);
+    q1.push_back(200);
+    q_type  q2 = q1;
+    REQUIRE(q2.size() == 2);
+    REQUIRE(q2[0] == 100);
+    REQUIRE(q2[1] == 200);
+}
+
+TEST_CASE("test_front", "[circular_q]")
+{
+    q_type q(2);
+    q.push_back(100);
+    q.push_back(200);
+    REQUIRE(q.front() == 100);
+}
+
+TEST_CASE("test_overrun_counter", "[circular_q]")
+{
+    q_type q(2);
+    REQUIRE(q.overrun_counter() == 0);
+    for(size_t i=0; i<10; i++)
+    {
+        q.push_back(100);
+    }
+    REQUIRE(q.overrun_counter() == 8);
+}
+
+
+
+