General test cleanups

Author: Zac-HD

hypothesis-python/tests/cover/test_regex.py

@@ -429,7 +429,6 @@ def test_fullmatch_generates_example(pattern, matching_str):
     find_any(
         st.from_regex(pattern, fullmatch=True),
         lambda s: s == matching_str,
-        settings(max_examples=10**6),
     )
 
 

hypothesis-python/tests/nocover/test_complex_numbers.py

@@ -10,13 +10,12 @@
 
 import pytest
 
-from hypothesis import given, settings, strategies as st
+from hypothesis import given, strategies as st
 
 
 @pytest.mark.parametrize("width", [32, 64, 128])
 @pytest.mark.parametrize("keyword", ["min_magnitude", "max_magnitude"])
 @given(data=st.data())
-@settings(max_examples=1000)
 def test_magnitude_validates(width, keyword, data):
     # See https://github.com/HypothesisWorks/hypothesis/issues/3573
     component_width = width / 2

hypothesis-python/tests/nocover/test_database_usage.py

@@ -100,18 +100,18 @@ def condition(x):
     invalid.add(value)
     with deterministic_PRNG():
         stuff()
-
     assert len(all_values(database)) < original
 
 
 def test_respects_max_examples_in_database_usage():
     key = b"a database key"
     database = InMemoryExampleDatabase()
     do_we_care = True
-    counter = [0]
+    counter = 0
 
     def check(x):
-        counter[0] += 1
+        nonlocal counter
+        counter += 1
         return do_we_care and has_a_non_zero_byte(x)
 
     def stuff():
@@ -129,9 +129,10 @@ def stuff():
         stuff()
     assert len(all_values(database)) > 10
     do_we_care = False
-    counter[0] = 0
-    stuff()
-    assert counter == [10]
+    counter = 0
+    with deterministic_PRNG():
+        stuff()
+    assert counter == 10
 
 
 def test_does_not_use_database_when_seed_is_forced(monkeypatch):

hypothesis-python/tests/numpy/test_from_dtype.py

@@ -69,7 +69,7 @@ def test_is_t(x):
     test_is_t()
 
 
-@settings(max_examples=100)
+@settings(max_examples=100, deadline=None)
 @given(nps.nested_dtypes(max_itemsize=400), st.data())
 def test_infer_strategy_from_dtype(dtype, data):
     # Given a dtype