diff --git a/asdf/_tests/tags/core/tests/test_ndarray.py b/asdf/_tests/tags/core/tests/test_ndarray.py
index d0aac5d8a..13a0aa958 100644
--- a/asdf/_tests/tags/core/tests/test_ndarray.py
+++ b/asdf/_tests/tags/core/tests/test_ndarray.py
@@ -180,24 +180,21 @@ def __init__(self, array):
         def array(self):
             return np.array(self._array)
 
-
     class NDArrayContainerConverter:
         tags = ["http://somewhere.org/tags/foo-1.0.0"]
         types = [NDArrayContainer]
 
         def to_yaml_tree(self, obj, tag, ctx):
-            return {'array': obj.array}
+            return {"array": obj.array}
 
         def from_yaml_tree(self, node, tag, ctx):
-            return NDArrayContainer(node['array'])
-
+            return NDArrayContainer(node["array"])
 
     class NDArrayContainerExtension:
         tags = NDArrayContainerConverter.tags
         converters = [NDArrayContainerConverter()]
         extension_uri = "http://somewhere.org/extensions/foo-1.0.0"
 
-
     container = NDArrayContainer([[1, 2], [3, 4]])
     tree = {"test": container}
 
diff --git a/asdf/_tests/test_schema.py b/asdf/_tests/test_schema.py
index f868b82d0..c2d50a398 100644
--- a/asdf/_tests/test_schema.py
+++ b/asdf/_tests/test_schema.py
@@ -41,7 +41,8 @@ class Scalar:
         def __init__(self, value):
             self.value = value
 
-    scalar_tag = 'http://somewhere.org/tags/scalar-1.0.0'
+    scalar_tag = "http://somewhere.org/tags/scalar-1.0.0"
+
     class ScalarConverter:
         tags = [scalar_tag]
         types = [Scalar]
@@ -55,7 +56,7 @@ def from_yaml_tree(self, node, tag, ctx):
     class ScalarExtension:
         tags = [scalar_tag]
         converters = [ScalarConverter()]
-        extension_uri = 'http://somewhere.org/extensions/scalar-1.0.0'
+        extension_uri = "http://somewhere.org/extensions/scalar-1.0.0"
 
     yaml = f"""
 tagged: !<{scalar_tag}>
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 34a857c96..4f8b48f5b 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,14 +1,14 @@
-git+https://github.com/astropy/asdf-astropy
 git+https://github.com/asdf-format/asdf-coordinates-schemas
 git+https://github.com/asdf-format/asdf-standard
 git+https://github.com/asdf-format/asdf-transform-schemas
 git+https://github.com/asdf-format/asdf-unit-schemas.git
 git+https://github.com/asdf-format/asdf-wcs-schemas
-git+https://github.com/astropy/astropy
-git+https://github.com/spacetelescope/gwcs
 #git+https://github.com/yaml/pyyaml.git
 # jsonschema 4.18 contains incompatible changes: https://github.com/asdf-format/asdf/issues/1485
 #git+https://github.com/python-jsonschema/jsonschema
 
 numpy>=0.0.dev0
+# although we don't use scipy, we include it here so that any dependency
+# that uses it during these tests will use the development version
+# which is more likely to work with the above development version of numpy
 scipy>=0.0.dev0