diff --git a/loopy/kernel/instruction.py b/loopy/kernel/instruction.py
index de546bed3a74da97bc4e7d52ac00551ec9715e76..a67b4256626fff3d7a77af63f72eab0460aa327b 100644
--- a/loopy/kernel/instruction.py
+++ b/loopy/kernel/instruction.py
@@ -166,7 +166,6 @@ class InstructionBase(Record):
                 from pymbolic.primitives import LogicalNot
                 from loopy.symbolic import parse
                 if pred.startswith("!"):
-                    from warnings import warn
                     warn("predicates starting with '!' are deprecated. "
                             "Simply use 'not' instead")
                     pred = LogicalNot(parse(pred[1:]))
@@ -405,14 +404,12 @@ class InstructionBase(Record):
 
     def copy(self, **kwargs):
         if "insn_deps" in kwargs:
-            from warnings import warn
             warn("insn_deps is deprecated, use depends_on",
                     DeprecationWarning, stacklevel=2)
 
             kwargs["depends_on"] = kwargs.pop("insn_deps")
 
         if "insn_deps_is_final" in kwargs:
-            from warnings import warn
             warn("insn_deps_is_final is deprecated, use depends_on",
                     DeprecationWarning, stacklevel=2)
 
@@ -831,7 +828,6 @@ class Assignment(MultiAssignmentBase):
 
 class ExpressionInstruction(Assignment):
     def __init__(self, *args, **kwargs):
-        from warnings import warn
         warn("ExpressionInstruction is deprecated. Use Assignment instead",
                 DeprecationWarning, stacklevel=2)