diff --git a/lldb/test/python_api/default-constructor/TestDefaultConstructorForAPIObjects.py b/lldb/test/python_api/default-constructor/TestDefaultConstructorForAPIObjects.py
index df8b42eb70f7..804d2c8c82c4 100644
--- a/lldb/test/python_api/default-constructor/TestDefaultConstructorForAPIObjects.py
+++ b/lldb/test/python_api/default-constructor/TestDefaultConstructorForAPIObjects.py
@@ -191,6 +191,9 @@ class APIDefaultConstructorTestCase(TestBase):
         if self.TraceOn():
             print obj
         self.assertFalse(obj)
+        # Do fuzz testing on the invalid obj, it should not crash lldb.
+        import sb_lineentry
+        sb_lineentry.fuzz_obj(obj)
 
     @python_api_test
     def test_SBListener(self):
diff --git a/lldb/test/python_api/default-constructor/sb_instruction.py b/lldb/test/python_api/default-constructor/sb_instruction.py
index 91d2930cb2fa..b961bc389e31 100644
--- a/lldb/test/python_api/default-constructor/sb_instruction.py
+++ b/lldb/test/python_api/default-constructor/sb_instruction.py
@@ -7,7 +7,7 @@ import lldb
 
 def fuzz_obj(obj):
     obj.GetAddress()
-    obj.GetByteSize
+    obj.GetByteSize()
     obj.DoesBranch()
     obj.Print(None)
     obj.GetDescription(lldb.SBStream())
diff --git a/lldb/test/python_api/default-constructor/sb_lineentry.py b/lldb/test/python_api/default-constructor/sb_lineentry.py
new file mode 100644
index 000000000000..d97f2517f4bc
--- /dev/null
+++ b/lldb/test/python_api/default-constructor/sb_lineentry.py
@@ -0,0 +1,14 @@
+"""
+Fuzz tests an object after the default construction to make sure it does not crash lldb.
+"""
+
+import sys
+import lldb
+
+def fuzz_obj(obj):
+    obj.GetStartAddress()
+    obj.GetEndAddress()
+    obj.GetFileSpec()
+    obj.GetLine()
+    obj.GetColumn()
+    obj.GetDescription(lldb.SBStream())