3 files changed, 12 insertions, 1 deletions
diff --git a/tests/float/complex1.py b/tests/float/complex1.py
index f4107a1390..0a1d98b9af 100644
--- a/tests/float/complex1.py
+++ b/tests/float/complex1.py
@@ -12,9 +12,11 @@ print(complex("1.2j"))
 print(complex("1+j"))
 print(complex("1+2j"))
 print(complex("-1-2j"))
+print(complex("-1+2j"))
 print(complex("+1-2j"))
 print(complex(" -1-2j "))
 print(complex(" +1-2j "))
+print(complex(" -1+2j "))
 print(complex("nanj"))
 print(complex("nan-infj"))
 print(complex(1, 2))
diff --git a/tests/float/float_array.py b/tests/float/float_array.py
index 3d128da838..cfff3b220c 100644
--- a/tests/float/float_array.py
+++ b/tests/float/float_array.py
@@ -19,4 +19,10 @@ def test(a):
 test(array("f"))
 test(array("d"))
 
-print("{:.4f}".format(array("f", bytes(array("I", [0x3DCCCCCC])))[0]))
+# hand-crafted floats, including non-standard nan
+for float_hex in (0x3DCCCCCC, 0x7F800024, 0x7FC00004):
+    f = array("f", bytes(array("I", [float_hex])))[0]
+    if type(f) is float:
+        print("{:.4e}".format(f))
+    else:
+        print(f)
diff --git a/tests/float/math_constants_extra.py b/tests/float/math_constants_extra.py
index dea49aef5a..756cb45803 100644
--- a/tests/float/math_constants_extra.py
+++ b/tests/float/math_constants_extra.py
@@ -9,9 +9,12 @@ except (ImportError, AttributeError):
     raise SystemExit
 
 print(math.tau == 2.0 * math.pi)
+print(math.copysign(1.0, math.tau))
 
 print(math.inf == float("inf"))
 print(-math.inf == -float("inf"))
+print(math.copysign(1.0, math.inf))
 
 print(isnan(math.nan))
 print(isnan(-math.nan))
+print(math.copysign(1.0, math.nan))