diff --git a/common/src/test/java/me/topchetoeu/j2s/common/TestFilename.java b/common/src/test/java/me/topchetoeu/j2s/common/TestFilename.java
new file mode 100644
index 0000000..0da76e0
--- /dev/null
+++ b/common/src/test/java/me/topchetoeu/j2s/common/TestFilename.java
@@ -0,0 +1,39 @@
+package me.topchetoeu.j2s.common;
+
+import org.junit.jupiter.api.Test;
+
+import me.topchetoeu.j2s.common.parsing.Filename;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class TestFilename {
+	@Test public void testShouldParseFilePath() {
+		var filename = Filename.parse("file://hello.world");
+		assertEquals("file", filename.protocol);
+		assertEquals("hello.world", filename.path);
+	}
+	@Test public void testShouldParseNoProtocolFilename() {
+		var filename = Filename.parse("hello.world");
+		assertEquals("file", filename.protocol);
+		assertEquals("hello.world", filename.path);
+	}
+	@Test public void testShouldParseAdditionalSlashFilename() {
+		var filename = Filename.parse("test:///hello.world");
+		assertEquals("test", filename.protocol);
+		assertEquals("/hello.world", filename.path);
+	}
+	@Test public void testShouldParseOneSlashFilename() {
+		var filename = Filename.parse("test:/hello.world");
+		assertEquals("file", filename.protocol);
+		assertEquals("test:/hello.world", filename.path);
+	}
+	@Test public void testShouldParseMatroshkaFilename() {
+		var a = Filename.parse("a://b://hello.world");
+		assertEquals("a", a.protocol);
+		assertEquals("b://hello.world", a.path);
+
+		var b = Filename.parse(a.path);
+		assertEquals("b", b.protocol);
+		assertEquals("hello.world", b.path);
+	}
+}