diff --git a/sympy/physics/quantum/anticommutator.py b/sympy/physics/quantum/anticommutator.py
index 142d2f77678b..724847d02f4b 100644
--- a/sympy/physics/quantum/anticommutator.py
+++ b/sympy/physics/quantum/anticommutator.py
@@ -130,7 +130,8 @@ def _sympyrepr(self, printer, *args):
         )
 
     def _sympystr(self, printer, *args):
-        return "{%s,%s}" % (self.args[0], self.args[1])
+        return "{%s,%s}" % (
+            printer._print(self.args[0]), printer._print(self.args[1]))
 
     def _pretty(self, printer, *args):
         pform = printer._print(self.args[0], *args)
diff --git a/sympy/physics/quantum/commutator.py b/sympy/physics/quantum/commutator.py
index 94cd53a1f245..37a1d00c6e46 100644
--- a/sympy/physics/quantum/commutator.py
+++ b/sympy/physics/quantum/commutator.py
@@ -219,7 +219,8 @@ def _sympyrepr(self, printer, *args):
         )
 
     def _sympystr(self, printer, *args):
-        return "[%s,%s]" % (self.args[0], self.args[1])
+        return "[%s,%s]" % (
+            printer._print(self.args[0]), printer._print(self.args[1]))
 
     def _pretty(self, printer, *args):
         pform = printer._print(self.args[0], *args)
diff --git a/sympy/physics/quantum/innerproduct.py b/sympy/physics/quantum/innerproduct.py
index 3b2a9ee70439..8154416bc4e0 100644
--- a/sympy/physics/quantum/innerproduct.py
+++ b/sympy/physics/quantum/innerproduct.py
@@ -98,8 +98,8 @@ def _sympyrepr(self, printer, *args):
             printer._print(self.bra, *args), printer._print(self.ket, *args))
 
     def _sympystr(self, printer, *args):
-        sbra = str(self.bra)
-        sket = str(self.ket)
+        sbra = printer._print(self.bra)
+        sket = printer._print(self.ket)
         return '%s|%s' % (sbra[:-1], sket[1:])
 
     def _pretty(self, printer, *args):
diff --git a/sympy/physics/quantum/operator.py b/sympy/physics/quantum/operator.py
index 27276bb38df9..1a8db4b3c30f 100644
--- a/sympy/physics/quantum/operator.py
+++ b/sympy/physics/quantum/operator.py
@@ -458,7 +458,7 @@ def _eval_adjoint(self):
         return OuterProduct(Dagger(self.bra), Dagger(self.ket))
 
     def _sympystr(self, printer, *args):
-        return str(self.ket) + str(self.bra)
+        return printer._print(self.ket) + printer._print(self.bra)
 
     def _sympyrepr(self, printer, *args):
         return '%s(%s,%s)' % (self.__class__.__name__,
diff --git a/sympy/physics/quantum/tensorproduct.py b/sympy/physics/quantum/tensorproduct.py
index 289a178a0181..5ebfe9a405cc 100644
--- a/sympy/physics/quantum/tensorproduct.py
+++ b/sympy/physics/quantum/tensorproduct.py
@@ -149,13 +149,12 @@ def _eval_rewrite(self, pattern, rule, **hints):
         return TensorProduct(*terms).expand(tensorproduct=True)
 
     def _sympystr(self, printer, *args):
-        from sympy.printing.str import sstr
         length = len(self.args)
         s = ''
         for i in range(length):
             if isinstance(self.args[i], (Add, Pow, Mul)):
                 s = s + '('
-            s = s + sstr(self.args[i])
+            s = s + printer._print(self.args[i])
             if isinstance(self.args[i], (Add, Pow, Mul)):
                 s = s + ')'
             if i != length - 1: