4 files changed, 15 insertions, 0 deletions
diff --git a/tests/basics/errno1.py b/tests/basics/errno1.py
index 63930b767..d7a5ccd54 100644
--- a/tests/basics/errno1.py
+++ b/tests/basics/errno1.py
@@ -15,3 +15,7 @@ print(msg[:7], msg[-5:])
 
 # check that unknown errno is still rendered
 print(str(OSError(9999)))
+
+# this tests a failed constant lookup in errno
+errno = uerrno
+print(errno.__name__)
diff --git a/tests/basics/errno1.py.exp b/tests/basics/errno1.py.exp
index c3703df4a..7dd22757d 100644
--- a/tests/basics/errno1.py.exp
+++ b/tests/basics/errno1.py.exp
@@ -1,3 +1,4 @@
 <class 'int'>
 [Errno  ] EIO
 9999
+uerrno
diff --git a/tests/basics/int_constfolding.py b/tests/basics/int_constfolding.py
index 7bb538378..158897f55 100644
--- a/tests/basics/int_constfolding.py
+++ b/tests/basics/int_constfolding.py
@@ -29,3 +29,9 @@ print(123 // 7, 123 % 7)
 print(-123 // 7, -123 % 7)
 print(123 // -7, 123 % -7)
 print(-123 // -7, -123 % -7)
+
+# won't fold so an exception can be raised at runtime
+try:
+    1 << -1
+except ValueError:
+    print('ValueError')
diff --git a/tests/basics/syntaxerror.py b/tests/basics/syntaxerror.py
index 4161de017..843459f0b 100644
--- a/tests/basics/syntaxerror.py
+++ b/tests/basics/syntaxerror.py
@@ -29,6 +29,10 @@ test_syntax(" a\n")
 # malformed integer literal (parser error)
 test_syntax("123z")
 
+# input doesn't match the grammar (parser error)
+test_syntax('1 or 2 or')
+test_syntax('{1:')
+
 # can't assign to literals
 test_syntax("1 = 2")
 test_syntax("'' = 1")