diff --git a/org.moreunit.core.test/test/org/moreunit/core/log/DefaultLoggerTest.java b/org.moreunit.core.test/test/org/moreunit/core/log/DefaultLoggerTest.java
new file mode 100644
index 00000000..e9ef5ea5
--- /dev/null
+++ b/org.moreunit.core.test/test/org/moreunit/core/log/DefaultLoggerTest.java
@@ -0,0 +1,140 @@
+package org.moreunit.core.log;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+
+import org.eclipse.core.runtime.ILog;
+import org.eclipse.core.runtime.IStatus;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.ArgumentCaptor;
+
+public class DefaultLoggerTest
+{
+    private static final String PLUGIN_ID = "org.moreunit.core.test";
+    private static final String LOG_LEVEL_PROPERTY = "org.moreunit.log.level";
+
+    private ILog mockLog;
+
+    @Before
+    public void setUp()
+    {
+        mockLog = mock(ILog.class);
+    }
+
+    @After
+    public void tearDown()
+    {
+        System.clearProperty(LOG_LEVEL_PROPERTY);
+    }
+
+    @Test
+    public void default_level_is_info_when_property_not_set()
+    {
+        DefaultLogger logger = new DefaultLogger(mockLog, PLUGIN_ID, LOG_LEVEL_PROPERTY);
+
+        assertThat(logger.traceEnabled()).isFalse();
+        assertThat(logger.debugEnabled()).isFalse();
+        assertThat(logger.infoEnabled()).isTrue();
+        assertThat(logger.warnEnabled()).isTrue();
+        assertThat(logger.errorEnabled()).isTrue();
+    }
+
+    @Test
+    public void trace_level_enabled()
+    {
+        System.setProperty(LOG_LEVEL_PROPERTY, "trace");
+        DefaultLogger logger = new DefaultLogger(mockLog, PLUGIN_ID, LOG_LEVEL_PROPERTY);
+
+        assertThat(logger.traceEnabled()).isTrue();
+        assertThat(logger.debugEnabled()).isTrue();
+
+        logger.trace("trace message");
+        logger.debug("debug message");
+
+        ArgumentCaptor<IStatus> statusCaptor = ArgumentCaptor.forClass(IStatus.class);
+        verify(mockLog, org.mockito.Mockito.times(2)).log(statusCaptor.capture());
+
+        assertThat(statusCaptor.getAllValues().get(0).getMessage()).isEqualTo("[TRACE] trace message");
+        assertThat(statusCaptor.getAllValues().get(0).getSeverity()).isEqualTo(IStatus.INFO);
+        assertThat(statusCaptor.getAllValues().get(1).getMessage()).isEqualTo("[DEBUG] debug message");
+        assertThat(statusCaptor.getAllValues().get(1).getSeverity()).isEqualTo(IStatus.INFO);
+    }
+
+    @Test
+    public void warn_level_enabled()
+    {
+        System.setProperty(LOG_LEVEL_PROPERTY, "WARNING");
+        DefaultLogger logger = new DefaultLogger(mockLog, PLUGIN_ID, LOG_LEVEL_PROPERTY);
+
+        assertThat(logger.infoEnabled()).isFalse();
+        assertThat(logger.warnEnabled()).isTrue();
+
+        logger.info("info message");
+        verify(mockLog, never()).log(any(IStatus.class));
+
+        logger.warn("warn message");
+        ArgumentCaptor<IStatus> statusCaptor = ArgumentCaptor.forClass(IStatus.class);
+        verify(mockLog).log(statusCaptor.capture());
+
+        assertThat(statusCaptor.getValue().getMessage()).isEqualTo("warn message");
+        assertThat(statusCaptor.getValue().getSeverity()).isEqualTo(IStatus.WARNING);
+    }
+
+    @Test
+    public void error_level_enabled_with_throwable()
+    {
+        System.setProperty(LOG_LEVEL_PROPERTY, "ERROR");
+        DefaultLogger logger = new DefaultLogger(mockLog, PLUGIN_ID, LOG_LEVEL_PROPERTY);
+
+        assertThat(logger.warnEnabled()).isFalse();
+        assertThat(logger.errorEnabled()).isTrue();
+
+        Throwable exception = new RuntimeException("Test exception");
+        logger.error("error message", exception);
+
+        ArgumentCaptor<IStatus> statusCaptor = ArgumentCaptor.forClass(IStatus.class);
+        verify(mockLog).log(statusCaptor.capture());
+
+        assertThat(statusCaptor.getValue().getMessage()).isEqualTo("error message");
+        assertThat(statusCaptor.getValue().getSeverity()).isEqualTo(IStatus.ERROR);
+        assertThat(statusCaptor.getValue().getException()).isEqualTo(exception);
+    }
+
+    @Test
+    public void error_level_only_throwable()
+    {
+        System.setProperty(LOG_LEVEL_PROPERTY, "ERROR");
+        DefaultLogger logger = new DefaultLogger(mockLog, PLUGIN_ID, LOG_LEVEL_PROPERTY);
+
+        Throwable exception = new RuntimeException("Test exception");
+        logger.error(exception);
+
+        ArgumentCaptor<IStatus> statusCaptor = ArgumentCaptor.forClass(IStatus.class);
+        verify(mockLog).log(statusCaptor.capture());
+
+        assertThat(statusCaptor.getValue().getMessage()).contains("java.lang.RuntimeException: Test exception");
+        assertThat(statusCaptor.getValue().getSeverity()).isEqualTo(IStatus.ERROR);
+    }
+
+    @Test
+    public void warn_level_with_throwable()
+    {
+        System.setProperty(LOG_LEVEL_PROPERTY, "WARNING");
+        DefaultLogger logger = new DefaultLogger(mockLog, PLUGIN_ID, LOG_LEVEL_PROPERTY);
+
+        Throwable exception = new RuntimeException("Test exception");
+        logger.warn("warn message", exception);
+
+        ArgumentCaptor<IStatus> statusCaptor = ArgumentCaptor.forClass(IStatus.class);
+        verify(mockLog).log(statusCaptor.capture());
+
+        assertThat(statusCaptor.getValue().getMessage()).isEqualTo("warn message");
+        assertThat(statusCaptor.getValue().getSeverity()).isEqualTo(IStatus.WARNING);
+        assertThat(statusCaptor.getValue().getException()).isEqualTo(exception);
+    }
+}
diff --git a/org.moreunit.core.test/test/org/moreunit/core/log/LevelTest.java b/org.moreunit.core.test/test/org/moreunit/core/log/LevelTest.java
new file mode 100644
index 00000000..d5fc6727
--- /dev/null
+++ b/org.moreunit.core.test/test/org/moreunit/core/log/LevelTest.java
@@ -0,0 +1,32 @@
+package org.moreunit.core.log;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.Test;
+
+public class LevelTest
+{
+    @Test
+    public void isLowerThan_should_return_true_when_other_is_higher()
+    {
+        assertThat(Level.TRACE.isLowerThan(Level.DEBUG)).isTrue();
+        assertThat(Level.DEBUG.isLowerThan(Level.INFO)).isTrue();
+        assertThat(Level.INFO.isLowerThan(Level.WARNING)).isTrue();
+        assertThat(Level.WARNING.isLowerThan(Level.ERROR)).isTrue();
+    }
+
+    @Test
+    public void isLowerThan_should_return_false_when_other_is_lower()
+    {
+        assertThat(Level.ERROR.isLowerThan(Level.WARNING)).isFalse();
+        assertThat(Level.WARNING.isLowerThan(Level.INFO)).isFalse();
+        assertThat(Level.INFO.isLowerThan(Level.DEBUG)).isFalse();
+        assertThat(Level.DEBUG.isLowerThan(Level.TRACE)).isFalse();
+    }
+
+    @Test
+    public void isLowerThan_should_return_false_when_same()
+    {
+        assertThat(Level.INFO.isLowerThan(Level.INFO)).isFalse();
+    }
+}