diff --git a/tests/Makefile b/tests/Makefile
index 835ec9c..c27940c 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -214,6 +214,8 @@
 	missing-type.json bad-ident.json ident-with-escape.json \
 	double-type.json bad-base.json bad-type-bool.json bad-type-int.json \
 	bad-type-dict.json double-data.json unknown-expr-key.json \
+	redefined-type.json redefined-command.json redefined-builtin.json \
+	redefined-event.json command-int.json event-max.json \
 	missing-colon.json missing-comma-list.json \
 	missing-comma-object.json non-objects.json \
 	qapi-schema-test.json quoted-structural-chars.json \
diff --git a/tests/qapi-schema/command-int.err b/tests/qapi-schema/command-int.err
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tests/qapi-schema/command-int.err
diff --git a/tests/qapi-schema/command-int.exit b/tests/qapi-schema/command-int.exit
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/tests/qapi-schema/command-int.exit
@@ -0,0 +1 @@
+0
diff --git a/tests/qapi-schema/command-int.json b/tests/qapi-schema/command-int.json
new file mode 100644
index 0000000..fcbb643
--- /dev/null
+++ b/tests/qapi-schema/command-int.json
@@ -0,0 +1,3 @@
+# FIXME: we should reject collisions between commands and types
+{ 'command': 'int', 'data': { 'character': 'str' },
+  'returns': { 'value': 'int' } }
diff --git a/tests/qapi-schema/command-int.out b/tests/qapi-schema/command-int.out
new file mode 100644
index 0000000..d8e1854
--- /dev/null
+++ b/tests/qapi-schema/command-int.out
@@ -0,0 +1,3 @@
+[OrderedDict([('command', 'int'), ('data', OrderedDict([('character', 'str')])), ('returns', OrderedDict([('value', 'int')]))])]
+[]
+[]
diff --git a/tests/qapi-schema/event-max.err b/tests/qapi-schema/event-max.err
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tests/qapi-schema/event-max.err
diff --git a/tests/qapi-schema/event-max.exit b/tests/qapi-schema/event-max.exit
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/tests/qapi-schema/event-max.exit
@@ -0,0 +1 @@
+0
diff --git a/tests/qapi-schema/event-max.json b/tests/qapi-schema/event-max.json
new file mode 100644
index 0000000..997c61c
--- /dev/null
+++ b/tests/qapi-schema/event-max.json
@@ -0,0 +1,2 @@
+# FIXME: an event named 'MAX' would conflict with implicit C enum
+{ 'event': 'MAX' }
diff --git a/tests/qapi-schema/event-max.out b/tests/qapi-schema/event-max.out
new file mode 100644
index 0000000..010c42b
--- /dev/null
+++ b/tests/qapi-schema/event-max.out
@@ -0,0 +1,3 @@
+[OrderedDict([('event', 'MAX')])]
+[]
+[]
diff --git a/tests/qapi-schema/redefined-builtin.err b/tests/qapi-schema/redefined-builtin.err
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tests/qapi-schema/redefined-builtin.err
diff --git a/tests/qapi-schema/redefined-builtin.exit b/tests/qapi-schema/redefined-builtin.exit
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/tests/qapi-schema/redefined-builtin.exit
@@ -0,0 +1 @@
+0
diff --git a/tests/qapi-schema/redefined-builtin.json b/tests/qapi-schema/redefined-builtin.json
new file mode 100644
index 0000000..a10050d
--- /dev/null
+++ b/tests/qapi-schema/redefined-builtin.json
@@ -0,0 +1,2 @@
+# FIXME: we should reject types that duplicate builtin names
+{ 'type': 'size', 'data': { 'myint': 'size' } }
diff --git a/tests/qapi-schema/redefined-builtin.out b/tests/qapi-schema/redefined-builtin.out
new file mode 100644
index 0000000..b0a9aea
--- /dev/null
+++ b/tests/qapi-schema/redefined-builtin.out
@@ -0,0 +1,3 @@
+[OrderedDict([('type', 'size'), ('data', OrderedDict([('myint', 'size')]))])]
+[]
+[OrderedDict([('type', 'size'), ('data', OrderedDict([('myint', 'size')]))])]
diff --git a/tests/qapi-schema/redefined-command.err b/tests/qapi-schema/redefined-command.err
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tests/qapi-schema/redefined-command.err
diff --git a/tests/qapi-schema/redefined-command.exit b/tests/qapi-schema/redefined-command.exit
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/tests/qapi-schema/redefined-command.exit
@@ -0,0 +1 @@
+0
diff --git a/tests/qapi-schema/redefined-command.json b/tests/qapi-schema/redefined-command.json
new file mode 100644
index 0000000..d8c9975
--- /dev/null
+++ b/tests/qapi-schema/redefined-command.json
@@ -0,0 +1,3 @@
+# FIXME: we should reject commands defined more than once
+{ 'command': 'foo', 'data': { 'one': 'str' } }
+{ 'command': 'foo', 'data': { '*two': 'str' } }
diff --git a/tests/qapi-schema/redefined-command.out b/tests/qapi-schema/redefined-command.out
new file mode 100644
index 0000000..44ddba6
--- /dev/null
+++ b/tests/qapi-schema/redefined-command.out
@@ -0,0 +1,4 @@
+[OrderedDict([('command', 'foo'), ('data', OrderedDict([('one', 'str')]))]),
+ OrderedDict([('command', 'foo'), ('data', OrderedDict([('*two', 'str')]))])]
+[]
+[]
diff --git a/tests/qapi-schema/redefined-event.err b/tests/qapi-schema/redefined-event.err
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tests/qapi-schema/redefined-event.err
diff --git a/tests/qapi-schema/redefined-event.exit b/tests/qapi-schema/redefined-event.exit
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/tests/qapi-schema/redefined-event.exit
@@ -0,0 +1 @@
+0
diff --git a/tests/qapi-schema/redefined-event.json b/tests/qapi-schema/redefined-event.json
new file mode 100644
index 0000000..152cce7
--- /dev/null
+++ b/tests/qapi-schema/redefined-event.json
@@ -0,0 +1,3 @@
+# FIXME: we should reject duplicate events
+{ 'event': 'EVENT_A', 'data': { 'myint': 'int' } }
+{ 'event': 'EVENT_A', 'data': { 'myint': 'int' } }
diff --git a/tests/qapi-schema/redefined-event.out b/tests/qapi-schema/redefined-event.out
new file mode 100644
index 0000000..261b183
--- /dev/null
+++ b/tests/qapi-schema/redefined-event.out
@@ -0,0 +1,4 @@
+[OrderedDict([('event', 'EVENT_A'), ('data', OrderedDict([('myint', 'int')]))]),
+ OrderedDict([('event', 'EVENT_A'), ('data', OrderedDict([('myint', 'int')]))])]
+[]
+[]
diff --git a/tests/qapi-schema/redefined-type.err b/tests/qapi-schema/redefined-type.err
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tests/qapi-schema/redefined-type.err
diff --git a/tests/qapi-schema/redefined-type.exit b/tests/qapi-schema/redefined-type.exit
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/tests/qapi-schema/redefined-type.exit
@@ -0,0 +1 @@
+0
diff --git a/tests/qapi-schema/redefined-type.json b/tests/qapi-schema/redefined-type.json
new file mode 100644
index 0000000..7972194
--- /dev/null
+++ b/tests/qapi-schema/redefined-type.json
@@ -0,0 +1,3 @@
+# FIXME: we should reject types defined more than once
+{ 'type': 'foo', 'data': { 'one': 'str' } }
+{ 'enum': 'foo', 'data': [ 'two' ] }
diff --git a/tests/qapi-schema/redefined-type.out b/tests/qapi-schema/redefined-type.out
new file mode 100644
index 0000000..b509e57
--- /dev/null
+++ b/tests/qapi-schema/redefined-type.out
@@ -0,0 +1,4 @@
+[OrderedDict([('type', 'foo'), ('data', OrderedDict([('one', 'str')]))]),
+ OrderedDict([('enum', 'foo'), ('data', ['two'])])]
+[{'enum_name': 'foo', 'enum_values': ['two']}]
+[OrderedDict([('type', 'foo'), ('data', OrderedDict([('one', 'str')]))])]