diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 82045983..5a53dd6e 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -14,7 +14,7 @@
 # License for the specific language governing permissions and limitations under
 # the License.
 #
-set(FALCO_TESTS_SOURCES test_base.cpp engine/test_token_bucket.cpp engine/test_rulesets.cpp falco/test_webserver.cpp)
+set(FALCO_TESTS_SOURCES test_base.cpp engine/test_token_bucket.cpp falco/test_webserver.cpp engine/test_rulesets.cpp falco/test_profiler.cpp)
 
 set(FALCO_TESTED_LIBRARIES falco_engine)
 
diff --git a/tests/falco/test_profiler.cpp b/tests/falco/test_profiler.cpp
new file mode 100644
index 00000000..a216a9c3
--- /dev/null
+++ b/tests/falco/test_profiler.cpp
@@ -0,0 +1,39 @@
+/*
+Copyright (C) 2020 The Falco Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+#include "profiler.h"
+#include <catch.hpp>
+#include <thread>
+#include <chrono>
+
+void profiler_test_do_work()
+{
+	PROFILEME();
+	std::this_thread::sleep_for (std::chrono::seconds(1));
+}
+
+void profiler_test_do_work2()
+{
+	PROFILEME();
+	std::this_thread::sleep_for (std::chrono::seconds(1));
+}
+
+TEST_CASE("profiler works", "[profiler]")
+{
+	alloc_chunk();
+	profiler_test_do_work();
+	profiler_test_do_work2();
+	REQUIRE(labels.size() == 2);
+}
diff --git a/userspace/falco/profiler.h b/userspace/falco/profiler.h
index 1c3fdacf..204424da 100644
--- a/userspace/falco/profiler.h
+++ b/userspace/falco/profiler.h
@@ -64,7 +64,7 @@ struct profiler
 {
 	uint32_t* pd;
 
-	profiler(uint32_t label)
+	explicit profiler(uint32_t label)
 	{
 		pd = c.current;
 		auto next = pd + 5;