2 files changed, 18 insertions, 0 deletions
diff --git a/lib/sqlalchemy/testing/requirements.py b/lib/sqlalchemy/testing/requirements.py
index 408c3705e..e48fa2c00 100644
--- a/lib/sqlalchemy/testing/requirements.py
+++ b/lib/sqlalchemy/testing/requirements.py
@@ -394,6 +394,14 @@ class SuiteRequirements(Requirements):
         return exclusions.closed()
 
     @property
+    def precision_generic_float_type(self):
+        """target backend will return native floating point numbers with at
+        least seven decimal places when using the generic Float type.
+
+        """
+        return exclusions.open()
+
+    @property
     def floats_to_four_decimals(self):
         """target backend can return a floating-point number with four
         significant digits (such as 15.7563) accurately
diff --git a/lib/sqlalchemy/testing/suite/test_types.py b/lib/sqlalchemy/testing/suite/test_types.py
index 3eb105ba3..b147f891a 100644
--- a/lib/sqlalchemy/testing/suite/test_types.py
+++ b/lib/sqlalchemy/testing/suite/test_types.py
@@ -356,6 +356,16 @@ class NumericTest(_LiteralRoundTripFixture, fixtures.TestBase):
             filter_=lambda n: n is not None and round(n, 5) or None
         )
 
+
+    @testing.requires.precision_generic_float_type
+    def test_float_custom_scale(self):
+        self._do_test(
+            Float(None, decimal_return_scale=7, asdecimal=True),
+            [15.7563827, decimal.Decimal("15.7563827")],
+            [decimal.Decimal("15.7563827"),],
+            check_scale=True
+        )
+
     def test_numeric_as_decimal(self):
         self._do_test(
             Numeric(precision=8, scale=4),