diff --git a/mypy/test/data.py b/mypy/test/data.py
index 11a890ef8450..a9ae1fde37bd 100644
--- a/mypy/test/data.py
+++ b/mypy/test/data.py
@@ -556,6 +556,9 @@ def repr_failure(self, excinfo: Any) -> str:
 
 
 class DataSuite:
+    def __init__(self, *, update_data: bool) -> None:
+        self.update_data = update_data
+
     @classmethod
     def cases(cls) -> List[DataDrivenTestCase]:
         return []
diff --git a/mypy/test/testcheck.py b/mypy/test/testcheck.py
index 3aae19f1b40f..4ac59bd94f57 100644
--- a/mypy/test/testcheck.py
+++ b/mypy/test/testcheck.py
@@ -82,8 +82,6 @@
 
 
 class TypeCheckSuite(DataSuite):
-    def __init__(self, *, update_data: bool = False) -> None:
-        self.update_data = update_data
 
     @classmethod
     def cases(cls) -> List[DataDrivenTestCase]:
diff --git a/mypy/test/testdeps.py b/mypy/test/testdeps.py
index a648782428a1..d6580c40d65b 100644
--- a/mypy/test/testdeps.py
+++ b/mypy/test/testdeps.py
@@ -20,8 +20,6 @@
 
 
 class GetDependenciesSuite(DataSuite):
-    def __init__(self, *, update_data: bool) -> None:
-        pass
 
     @classmethod
     def cases(cls) -> List[DataDrivenTestCase]:
diff --git a/mypy/test/testdiff.py b/mypy/test/testdiff.py
index 84e5389ba4a2..3f9d2345e787 100644
--- a/mypy/test/testdiff.py
+++ b/mypy/test/testdiff.py
@@ -20,8 +20,6 @@
 
 
 class ASTDiffSuite(DataSuite):
-    def __init__(self, *, update_data: bool) -> None:
-        pass
 
     @classmethod
     def cases(cls) -> List[DataDrivenTestCase]:
diff --git a/mypy/test/testfinegrained.py b/mypy/test/testfinegrained.py
index fff2e18d26ba..7e442d545566 100644
--- a/mypy/test/testfinegrained.py
+++ b/mypy/test/testfinegrained.py
@@ -35,9 +35,6 @@
 
 
 class FineGrainedSuite(DataSuite):
-    def __init__(self, *, update_data: bool) -> None:
-        pass
-
     @classmethod
     def cases(cls) -> List[DataDrivenTestCase]:
         c = []  # type: List[DataDrivenTestCase]
diff --git a/mypy/test/testmerge.py b/mypy/test/testmerge.py
index ec437bb45e3a..4694865d284a 100644
--- a/mypy/test/testmerge.py
+++ b/mypy/test/testmerge.py
@@ -37,6 +37,7 @@
 
 class ASTMergeSuite(DataSuite):
     def __init__(self, *, update_data: bool) -> None:
+        super().__init__(update_data=update_data)
         self.str_conv = StrConv(show_ids=True)
         assert self.str_conv.id_mapper is not None
         self.id_mapper = self.str_conv.id_mapper  # type: IdMapper
diff --git a/mypy/test/testparse.py b/mypy/test/testparse.py
index d6789c034a84..ef9632a34372 100644
--- a/mypy/test/testparse.py
+++ b/mypy/test/testparse.py
@@ -7,25 +7,29 @@
 from mypy import defaults
 from mypy.myunit import Suite, AssertionFailure
 from mypy.test.helpers import assert_string_arrays_equal
-from mypy.test.data import parse_test_cases, DataDrivenTestCase
+from mypy.test.data import parse_test_cases, DataDrivenTestCase, DataSuite
 from mypy.test import config
 from mypy.parse import parse
 from mypy.errors import CompileError
 from mypy.options import Options
 
 
-class ParserSuite(Suite):
+class ParserSuite(DataSuite):
     parse_files = ['parse.test',
                    'parse-python2.test']
 
-    def cases(self) -> List[DataDrivenTestCase]:
+    @classmethod
+    def cases(cls) -> List[DataDrivenTestCase]:
         # The test case descriptions are stored in data files.
         c = []  # type: List[DataDrivenTestCase]
-        for f in self.parse_files:
+        for f in cls.parse_files:
             c += parse_test_cases(
                 os.path.join(config.test_data_prefix, f), test_parser)
         return c
 
+    def run_case(self, testcase: DataDrivenTestCase) -> None:
+        test_parser(testcase)
+
 
 def test_parser(testcase: DataDrivenTestCase) -> None:
     """Perform a single parser test case.
@@ -57,13 +61,17 @@ def test_parser(testcase: DataDrivenTestCase) -> None:
 INPUT_FILE_NAME = 'file'
 
 
-class ParseErrorSuite(Suite):
-    def cases(self) -> List[DataDrivenTestCase]:
+class ParseErrorSuite(DataSuite):
+    @classmethod
+    def cases(cls) -> List[DataDrivenTestCase]:
         # Test case descriptions are in an external file.
         return parse_test_cases(os.path.join(config.test_data_prefix,
                                              'parse-errors.test'),
                                 test_parse_error)
 
+    def run_case(self, testcase: DataDrivenTestCase) -> None:
+        test_parse_error(testcase)
+
 
 def test_parse_error(testcase: DataDrivenTestCase) -> None:
     try:
diff --git a/runtests.py b/runtests.py
index e10850ef76ce..fdb824fd7864 100755
--- a/runtests.py
+++ b/runtests.py
@@ -204,6 +204,7 @@ def add_imports(driver: Driver) -> None:
     'testdiff',
     'testfinegrained',
     'testmerge',
+    'testparse',
 ]]