diff --git a/src/test/java/io/github/classgraph/issues/issue277/Issue227Test.java b/src/test/java/io/github/classgraph/issues/issue277/Issue227Test.java
new file mode 100644
index 000000000..33c29f9dc
--- /dev/null
+++ b/src/test/java/io/github/classgraph/issues/issue277/Issue227Test.java
@@ -0,0 +1,20 @@
+package io.github.classgraph.issues.issue277;
+
+import io.github.classgraph.ClassGraph;
+import org.junit.Test;
+
+/**
+ * https://github.com/classgraph/classgraph/issues/277
+ */
+public class Issue227Test {
+
+    @Test
+    public void testNoArgsBlacklistLibOrExtJars() {
+        new ClassGraph().blacklistLibOrExtJars();
+    }
+
+    @Test
+    public void testNoArgsWhitelistLibOrExtJars() {
+        new ClassGraph().whitelistLibOrExtJars();
+    }
+}