diff --git a/CMakeLists.txt b/CMakeLists.txt
index d191757a..3ca96ed9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -80,6 +80,7 @@ option(DISABLE_BUNDLED_JSONCPP "Don't fall back to bundled JsonCpp" OFF)
 option(ENABLE_IWYU "Enable 'Include What You Use' scanner (CMake 3.3+)" OFF)
 
 option(ENABLE_PARALLEL_CTEST "Run CTest using multiple processors" ON)
+option(VERBOSE_TESTS "Run CTest with maximum verbosity" OFF)
 option(ENABLE_COVERAGE "Scan test coverage using gcov and report" OFF)
 
 option(ENABLE_DOCS "Build API documentation (requires Doxygen)" ON)
@@ -187,9 +188,12 @@ if(BUILD_TESTING)
     ProcessorCount(CPU_COUNT)
     if(CPU_COUNT GREATER 1)
       add_feature_info("Parallel tests" TRUE "Unit tests can use ${CPU_COUNT} processors")
-      set(CTEST_OPTIONS "-j${CPU_COUNT}")
+      list(APPEND CTEST_OPTIONS "-j${CPU_COUNT}")
     endif()
   endif()
+  if(VERBOSE_TESTS)
+    list(APPEND CTEST_OPTIONS "-VV")
+  endif()
   add_subdirectory(tests)
 endif()
 add_feature_info("Unit tests" ${BUILD_TESTING} "Compile unit tests for library functions")
diff --git a/src/Settings.cpp b/src/Settings.cpp
index cfbe2e2c..688eaae3 100644
--- a/src/Settings.cpp
+++ b/src/Settings.cpp
@@ -28,14 +28,14 @@
  * along with OpenShot Library. If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <cstdlib>        // For std::getenv
+
 #include "Settings.h"
 
-using namespace std;
 using namespace openshot;
 
-
 // Global reference to Settings
-Settings *Settings::m_pInstance = NULL;
+Settings *Settings::m_pInstance = nullptr;
 
 // Create or Get an instance of the settings singleton
 Settings *Settings::Instance()
@@ -53,6 +53,9 @@ Settings *Settings::Instance()
 		m_pInstance->HW_EN_DEVICE_SET = 0;
 		m_pInstance->PLAYBACK_AUDIO_DEVICE_NAME = "";
 		m_pInstance->DEBUG_TO_STDERR = false;
+		auto env_debug = std::getenv("LIBOPENSHOT_DEBUG");
+		if (env_debug != nullptr)
+			m_pInstance->DEBUG_TO_STDERR = true;
 	}
 
 	return m_pInstance;
diff --git a/src/Settings.h b/src/Settings.h
index 36ba2917..e21822a0 100644
--- a/src/Settings.h
+++ b/src/Settings.h
@@ -31,19 +31,7 @@
 #ifndef OPENSHOT_SETTINGS_H
 #define OPENSHOT_SETTINGS_H
 
-
-#include <iostream>
-#include <iomanip>
-#include <fstream>
-#include <cstdlib>
 #include <string>
-#include <sstream>
-#include <cstdio>
-#include <ctime>
-#include <zmq.hpp>
-#include <unistd.h>
-#include <OpenShotAudio.h>
-
 
 namespace openshot {
 
@@ -118,7 +106,7 @@ namespace openshot {
 		/// The current install path of OpenShot (needs to be set when using Timeline(path), since certain
 		/// paths depend on the location of OpenShot transitions and files)
 		std::string PATH_OPENSHOT_INSTALL = "";
-    
+
  		/// Whether to dump ZeroMQ debug messages to stderr
 		bool DEBUG_TO_STDERR = false;
 
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 6c5c6d51..f519856b 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -24,6 +24,11 @@
 # along with OpenShot Library. If not, see <http://www.gnu.org/licenses/>.
 ################################################################################
 
+# Allow spaces in test names
+if(POLICY CMP0110)
+  cmake_policy(SET CMP0110 NEW)
+endif()
+
 # Test media path, used by unit tests for input data
 file(TO_NATIVE_PATH "${PROJECT_SOURCE_DIR}/examples/" TEST_MEDIA_PATH)
 
@@ -103,6 +108,18 @@ foreach(tname ${OPENSHOT_TESTS})
   list(APPEND CATCH2_TEST_TARGETS openshot-${tname}-test)
   list(APPEND CATCH2_TEST_NAMES ${tname})
 endforeach()
+# Add an additional special-case test, for an envvar-dependent setting
+add_test(NAME [=["Settings:Debug logging (enabled)"]=]
+  COMMAND
+    openshot-Settings-test "[environment]"
+  WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
+)
+set_tests_properties([=["Settings:Debug logging (enabled)"]=]
+  PROPERTIES
+    LABELS Settings
+    ENVIRONMENT "LIBOPENSHOT_DEBUG=1"
+)
+
 # Export target list for coverage use
 set(UNIT_TEST_TARGETS ${CATCH2_TEST_TARGETS} PARENT_SCOPE)
 set(UNIT_TEST_NAMES ${CATCH2_TEST_NAMES} PARENT_SCOPE)
diff --git a/tests/Settings.cpp b/tests/Settings.cpp
index e974ffd4..13239819 100644
--- a/tests/Settings.cpp
+++ b/tests/Settings.cpp
@@ -34,7 +34,7 @@
 
 using namespace openshot;
 
-TEST_CASE( "Default_Constructor", "[libopenshot][settings]" )
+TEST_CASE( "Constructor", "[libopenshot][settings]" )
 {
 	// Create an empty color
 	Settings *s = Settings::Instance();
@@ -43,7 +43,7 @@ TEST_CASE( "Default_Constructor", "[libopenshot][settings]" )
 	CHECK_FALSE(s->HIGH_QUALITY_SCALING);
 }
 
-TEST_CASE( "Change_Settings", "[libopenshot][settings]" )
+TEST_CASE( "Change settings", "[libopenshot][settings]" )
 {
 	// Create an empty color
 	Settings *s = Settings::Instance();
@@ -56,3 +56,12 @@ TEST_CASE( "Change_Settings", "[libopenshot][settings]" )
 	CHECK(Settings::Instance()->OMP_THREADS == 8);
 	CHECK(Settings::Instance()->HIGH_QUALITY_SCALING == true);
 }
+
+TEST_CASE( "Debug logging", "[libopenshot][settings][environment]")
+{
+	// Check the environment
+	auto envvar = std::getenv("LIBOPENSHOT_DEBUG");
+	const auto is_enabled = bool(envvar != nullptr);
+
+	CHECK(Settings::Instance()->DEBUG_TO_STDERR == is_enabled);
+}