diff --git a/test/Microsoft.ComponentDetection.Detectors.Tests/PythonVersionTests.cs b/test/Microsoft.ComponentDetection.Detectors.Tests/PythonVersionTests.cs
index 89f399baa..b407eb240 100644
--- a/test/Microsoft.ComponentDetection.Detectors.Tests/PythonVersionTests.cs
+++ b/test/Microsoft.ComponentDetection.Detectors.Tests/PythonVersionTests.cs
@@ -15,15 +15,28 @@ public class PythonVersionTests
         [TestMethod]
         public void TestBasicVersionConstruction()
         {
-            PythonVersion pythonVersion = new PythonVersion("4!3.2.1.1rc2.post99.dev2");
+            var pythonVersion = new PythonVersion("4!3.2.1.1rc2.post99.dev2");
 
-            Assert.AreEqual(pythonVersion.Epoch, 4);
-            Assert.AreEqual(pythonVersion.Release, "3.2.1.1");
-            Assert.AreEqual(pythonVersion.PreReleaseLabel, "rc");
-            Assert.AreEqual(pythonVersion.PostNumber, 99);
-            Assert.AreEqual(pythonVersion.DevNumber, 2);
+            Assert.AreEqual(4, pythonVersion.Epoch);
+            Assert.AreEqual("3.2.1.1", pythonVersion.Release);
+            Assert.AreEqual("rc", pythonVersion.PreReleaseLabel);
+            Assert.AreEqual(99, pythonVersion.PostNumber);
+            Assert.AreEqual("dev", pythonVersion.DevLabel);
+            Assert.AreEqual(2, pythonVersion.DevNumber);
+        }
+
+        [TestMethod]
+        public void TestDefaultDevVersionConstruction()
+        {
+            var pythonVersion = new PythonVersion("4!3.2.1.1rc2.post90.dev");
 
-            var newPythonVersion = new PythonVersion("0.3m1");
+            Assert.AreEqual(4, pythonVersion.Epoch);
+            Assert.AreEqual("3.2.1.1", pythonVersion.Release);
+            Assert.AreEqual("rc", pythonVersion.PreReleaseLabel);
+            Assert.AreEqual(2, pythonVersion.PreReleaseNumber);
+            Assert.AreEqual(90, pythonVersion.PostNumber);
+            Assert.AreEqual("dev", pythonVersion.DevLabel);
+            Assert.AreEqual(0, pythonVersion.DevNumber);
         }
 
         [TestMethod]