diff --git a/kdrag/solvers/__init__.py b/kdrag/solvers/__init__.py
index 08a5112..53b783a 100644
--- a/kdrag/solvers/__init__.py
+++ b/kdrag/solvers/__init__.py
@@ -420,7 +420,6 @@ class MultiSolver(BaseSolver):
     solver_classes = [
         VampireTHFSolver,
         EProverTHFSolver,
-        ZipperpositionSolver,
         LeoIIISolver,
     ]
     if shutil.which("zipperposition") is not None:
diff --git a/tests/test_solver.py b/tests/test_solver.py
index ded1a23..2b6b831 100644
--- a/tests/test_solver.py
+++ b/tests/test_solver.py
@@ -203,7 +203,8 @@ def check(s):
     assert check(VampireTHFSolver()) == smt.unsat
     assert check(EProverTHFSolver()) == smt.unsat
     assert check(MultiSolver()) == smt.unsat
-    assert check(ZipperpositionSolver()) == smt.unsat
+    if shutil.which("zipperposition") is not None:
+        assert check(ZipperpositionSolver()) == smt.unsat
     assert check(smt.Solver()) == smt.unsat
     assert check(solvers.VampireSolver()) == smt.unsat