diff --git a/src/sage/libs/mpmath/ext_main.pyx b/src/sage/libs/mpmath/ext_main.pyx
index f1a406598f2..03840b3d8df 100644
--- a/src/sage/libs/mpmath/ext_main.pyx
+++ b/src/sage/libs/mpmath/ext_main.pyx
@@ -580,8 +580,7 @@ cdef class Context:
             s = (<mpc>x).re.special
             t = (<mpc>x).im.special
             return s == S_NAN or t == S_NAN
-        if isinstance(x, (int, Integer)) \
-            or isinstance(x, rationallib.mpq):
+        if isinstance(x, (int, Integer, rationallib.mpq)):
             return False
         typ = MPF_set_any(&tmp_opx_re, &tmp_opx_im, x, global_opts, 0)
         if typ == 1:
@@ -622,8 +621,7 @@ cdef class Context:
             s = (<mpc>x).re.special
             t = (<mpc>x).im.special
             return s == S_INF or s == S_NINF or t == S_INF or t == S_NINF
-        if isinstance(x, (int, Integer)) \
-            or isinstance(x, rationallib.mpq):
+        if isinstance(x, (int, Integer, rationallib.mpq)):
             return False
         typ = MPF_set_any(&tmp_opx_re, &tmp_opx_im, x, global_opts, 0)
         if typ == 1:
@@ -671,8 +669,7 @@ cdef class Context:
             if re == libmp.fzero: return im_normal
             if im == libmp.fzero: return re_normal
             return re_normal and im_normal
-        if isinstance(x, (int, Integer)) \
-            or isinstance(x, rationallib.mpq):
+        if isinstance(x, (int, Integer, rationallib.mpq)):
             return bool(x)
         x = ctx.convert(x)
         if hasattr(x, '_mpf_') or hasattr(x, '_mpc_'):
diff --git a/src/sage/rings/finite_rings/finite_field_base.pyx b/src/sage/rings/finite_rings/finite_field_base.pyx
index 256be4e6bf5..332fedc4713 100644
--- a/src/sage/rings/finite_rings/finite_field_base.pyx
+++ b/src/sage/rings/finite_rings/finite_field_base.pyx
@@ -1358,7 +1358,7 @@ cdef class FiniteField(Field):
             False
         """
         from sage.rings.integer_ring import ZZ
-        if R in int or R is ZZ:
+        if R is int or R is ZZ:
             return True
         if isinstance(R, sage.rings.abc.IntegerModRing) and self.characteristic().divides(R.characteristic()):
             return R.hom((self.one(),), check=False)
diff --git a/src/sage/rings/real_mpfi.pyx b/src/sage/rings/real_mpfi.pyx
index f99f8ab2a54..f3de6a7ca6d 100644
--- a/src/sage/rings/real_mpfi.pyx
+++ b/src/sage/rings/real_mpfi.pyx
@@ -816,9 +816,7 @@ cdef class RealIntervalField_class(sage.rings.abc.RealIntervalField):
         prec = self._prec
 
         # Direct and efficient conversions
-        if S is ZZ or S is QQ:
-            return True
-        if S is int:
+        if S is ZZ or S is QQ or S is int:
             return True
         if isinstance(S, RealIntervalField_class):
             return (<RealIntervalField_class>S)._prec >= prec