2 files changed, 21 insertions, 4 deletions
diff --git a/tests/test_config.py b/tests/test_config.py
index 4c8735d2..109a2fbc 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -123,6 +123,19 @@ class ConfigTest(CoverageTest):
             ["the_$one", "anotherZZZ", "xZZZy", "xy", "huh${X}what"]
             )
 
+    def test_tweaks_after_constructor(self):
+        # Arguments to the constructor are applied to the configuation.
+        cov = coverage.coverage(timid=True, data_file="fooey.dat")
+        cov.config["run:timid"] = False
+
+        self.assertFalse(cov.config.timid)
+        self.assertFalse(cov.config.branch)
+        self.assertEqual(cov.config.data_file, "fooey.dat")
+
+        self.assertFalse(cov.config["run:timid"])
+        self.assertFalse(cov.config["run:branch"])
+        self.assertEqual(cov.config["run:data_file"], "fooey.dat")
+
 
 class ConfigFileTest(CoverageTest):
     """Tests of the config file settings in particular."""
diff --git a/tests/test_plugins.py b/tests/test_plugins.py
index 1bd2067d..1540c500 100644
--- a/tests/test_plugins.py
+++ b/tests/test_plugins.py
@@ -101,7 +101,8 @@ class PluginTest(CoverageTest):
             """)
 
         self.assert_doesnt_exist("evidence.out")
-        cov = coverage.Coverage(plugins=["my_plugin"])
+        cov = coverage.Coverage()
+        cov.config["run:plugins"] = ["my_plugin"]
         cov.start()
         cov.stop()
 
@@ -111,7 +112,8 @@ class PluginTest(CoverageTest):
     def test_missing_plugin_raises_import_error(self):
         # Prove that a missing plugin will raise an ImportError.
         with self.assertRaises(ImportError):
-            cov = coverage.Coverage(plugins=["does_not_exist_woijwoicweo"])
+            cov = coverage.Coverage()
+            cov.config["run:plugins"] = ["does_not_exist_woijwoicweo"]
             cov.start()
         cov.stop()
 
@@ -121,7 +123,8 @@ class PluginTest(CoverageTest):
             1/0
             """)
         with self.assertRaises(ZeroDivisionError):
-            cov = coverage.Coverage(plugins=["plugin_over_zero"])
+            cov = coverage.Coverage()
+            cov.config["run:plugins"] = ["plugin_over_zero"]
             cov.start()
         cov.stop()
 
@@ -139,7 +142,8 @@ class PluginTest(CoverageTest):
             d = 4
             """)
 
-        cov = coverage.Coverage(plugins=["tests.test_plugins"])
+        cov = coverage.Coverage()
+        cov.config["run:plugins"] = ["tests.test_plugins"]
 
         # Import the python file, executing it.
         self.start_import_stop(cov, "simple")