diff --git a/core/test/net/sf/openrocket/unit/UnitToStringTest.java b/core/test/net/sf/openrocket/unit/UnitToStringTest.java
new file mode 100644
index 000000000..22aed8a70
--- /dev/null
+++ b/core/test/net/sf/openrocket/unit/UnitToStringTest.java
@@ -0,0 +1,49 @@
+package net.sf.openrocket.unit;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+public class UnitToStringTest {
+
+	@Test
+	public void testToString() {
+		assertEquals("0",Unit.NOUNIT2.toString(0.00040));
+		assertEquals("0",Unit.NOUNIT2.toString(0.00050));
+		assertEquals("0",Unit.NOUNIT2.toString(0.00051));
+		assertEquals("0",Unit.NOUNIT2.toString(0.00060));
+		assertEquals("0",Unit.NOUNIT2.toString(0.0049));
+		assertEquals("0",Unit.NOUNIT2.toString(0.0050));
+		assertEquals("0.01",Unit.NOUNIT2.toString(0.0051));
+		assertEquals("0",Unit.NOUNIT2.toString(0.00123));
+		assertEquals("0.01",Unit.NOUNIT2.toString(0.0123));
+		assertEquals("0.12",Unit.NOUNIT2.toString(0.1234));
+		assertEquals("1.23",Unit.NOUNIT2.toString(1.2345));
+		assertEquals("12.3",Unit.NOUNIT2.toString(12.345));
+		assertEquals("123",Unit.NOUNIT2.toString(123.456));
+		assertEquals("1235",Unit.NOUNIT2.toString(1234.5678));
+		assertEquals("12346",Unit.NOUNIT2.toString(12345.6789));
+		assertEquals("123457",Unit.NOUNIT2.toString(123456.789));
+		assertEquals("1.23E6",Unit.NOUNIT2.toString(1234567.89));
+		assertEquals("1.23E7",Unit.NOUNIT2.toString(12345678.9));
+		assertEquals("0",Unit.NOUNIT2.toString(-0.00040));
+		assertEquals("0",Unit.NOUNIT2.toString(-0.00050));
+		assertEquals("0",Unit.NOUNIT2.toString(-0.00051));
+		assertEquals("0",Unit.NOUNIT2.toString(-0.00060));
+		assertEquals("0",Unit.NOUNIT2.toString(-0.0049));
+		assertEquals("0",Unit.NOUNIT2.toString(-0.0050));
+		assertEquals("-0.01",Unit.NOUNIT2.toString(-0.0051));
+		assertEquals("0",Unit.NOUNIT2.toString(-0.00123));
+		assertEquals("-0.01",Unit.NOUNIT2.toString(-0.0123));
+		assertEquals("-0.12",Unit.NOUNIT2.toString(-0.1234));
+		assertEquals("-1.23",Unit.NOUNIT2.toString(-1.2345));
+		assertEquals("-12.3",Unit.NOUNIT2.toString(-12.345));
+		assertEquals("-123",Unit.NOUNIT2.toString(-123.456));
+		assertEquals("-1235",Unit.NOUNIT2.toString(-1234.5678));
+		assertEquals("-12346",Unit.NOUNIT2.toString(-12345.6789));
+		assertEquals("-123457",Unit.NOUNIT2.toString(-123456.789));
+		assertEquals("-1.23E6",Unit.NOUNIT2.toString(-1234567.89));
+		assertEquals("-1.23E7",Unit.NOUNIT2.toString(-12345678.9));
+
+	}
+}