diff --git a/pytest/test_build_const_key_map.py b/pytest/test_build_const_key_map.py
index a780d00e..d6bbe8fe 100644
--- a/pytest/test_build_const_key_map.py
+++ b/pytest/test_build_const_key_map.py
@@ -6,10 +6,16 @@ from validate import validate_uncompyle
 
 @pytest.mark.skipif(PYTHON_VERSION < 3.6, reason='need at least python 3.6')
 @pytest.mark.parametrize('text', (
-    "{-0.: 'a', -1: 'b'}",
-    "{0.: 'a', -1: 'b'}",
-    "{0: 1, 2: 3}",
-    "{-0: 1, 2: 3}",
+    "{0.: 'a', -1: 'b'}",   # BUILD_MAP
+    "{'a':'b'}",            # BUILD_MAP
+    "{0: 1}",               # BUILD_MAP
+    "{b'0':1, b'2':3}",     # BUILD_CONST_KEY_MAP
+    "{0: 1, 2: 3}",         # BUILD_CONST_KEY_MAP
+    "{'a':'b','c':'d'}",    # BUILD_CONST_KEY_MAP
+    "{0: 1, 2: 3}",         # BUILD_CONST_KEY_MAP
+    "{'a': 1, 'b': 2}",     # BUILD_ONST_KEY_MAP
+    "{'a':'b','c':'d'}",    # BUILD_CONST_KEY_MAP
+    "{0.0:'b',0.1:'d'}",    # BUILD_CONST_KEY_MAP
 ))
 def test_build_const_key_map(text):
     validate_uncompyle(text)