diff --git a/_doctest_environment.py b/_doctest_environment.py
new file mode 100644
index 0000000..6971085
--- /dev/null
+++ b/_doctest_environment.py
@@ -0,0 +1,3 @@
+# Toplevel for doctesting with passagemath
+
+from sage.all__sagemath_modules import *
diff --git a/mclf/benchmarks/semistable.py b/mclf/benchmarks/semistable.py
index 4a4896f..e72af95 100644
--- a/mclf/benchmarks/semistable.py
+++ b/mclf/benchmarks/semistable.py
@@ -1,5 +1,7 @@
 # -*- coding: utf-8 -*-
-from sage.all import QQ, PolynomialRing, FunctionField
+from sage.rings.rational_field import Q as QQ
+from sage.rings.polynomial.polynomial_ring_constructor import PolynomialRing
+from sage.rings.function_field.constructor import FunctionField
 from mclf import SuperellipticCurve, SemistableModel, SmoothProjectiveCurve
 
 
diff --git a/mclf/berkovich/affinoid_domain.py b/mclf/berkovich/affinoid_domain.py
index fad3c0f..f76af3c 100644
--- a/mclf/berkovich/affinoid_domain.py
+++ b/mclf/berkovich/affinoid_domain.py
@@ -59,7 +59,9 @@
 # *****************************************************************************
 
 
-from sage.all import SageObject, Infinity, cached_method
+from sage.structure.sage_object import SageObject
+from sage.rings.infinity import Infinity
+from sage.misc.cachefunc import cached_method
 from mclf.berkovich.type_V_points import TypeVPointOnBerkovichLine
 from mclf.berkovich.berkovich_trees import BerkovichTree
 # from sage.misc.cachefunc import cached_method
diff --git a/mclf/berkovich/berkovich_line.py b/mclf/berkovich/berkovich_line.py
index 88224e5..2e04a8d 100644
--- a/mclf/berkovich/berkovich_line.py
+++ b/mclf/berkovich/berkovich_line.py
@@ -213,7 +213,12 @@
 #                  https://www.gnu.org/licenses/
 # *****************************************************************************
 
-from sage.all import SageObject, Infinity, sgn, GaussValuation, ZZ, cached_method
+from sage.structure.sage_object import SageObject
+from sage.rings.infinity import Infinity
+from sage.functions.generalized import sgn
+from sage.rings.valuation.gauss_valuation import GaussValuation
+from sage.rings.integer_ring import Z as ZZ
+from sage.misc.cachefunc import cached_method
 from sage.rings.valuation.limit_valuation import LimitValuation
 from sage.geometry.newton_polygon import NewtonPolygon
 # from sage.misc.cachefunc import cached_method
@@ -323,7 +328,7 @@ def point_from_pseudovaluation_on_polynomial_ring(self, v0, parameter=None):
         EXAMPLES::
 
             sage: from mclf import *
-            sage: from sage.all import GaussValuation
+            sage: from sage.rings.valuation.gauss_valuation import GaussValuation
             sage: F.<x> = FunctionField(QQ)
             sage: v2 = QQ.valuation(2)
             sage: X = BerkovichLine(F, v2)
@@ -409,7 +414,7 @@ def point_from_valuation(self, v):
             True
 
         """
-        from sage.all import Infinity
+        from sage.rings.infinity import Infinity
         F = self.function_field()
         assert v.domain() == F, "the domain of v must be the function field of the Berkovich line"
         v_K = self.base_valuation()
@@ -504,7 +509,7 @@ def point_from_discoid(self, f, s):
             # y for F such that v(f) >= s iff v(f1(y)) >= s1
             # then v0 can be defined as the inductive valuation on K[y]
             # characterized by v0(f1(y)) = s1
-            from sage.all import ceil
+            from sage.functions.other import ceil
             from sage.geometry.newton_polygon import NewtonPolygon
             f = R(f)
             np = NewtonPolygon([(i, vK(f[i])) for i in range(f.degree()+1)])
@@ -953,7 +958,7 @@ def inverse_parameter(self):
         EXAMPLES::
 
             sage: from mclf import *
-            sage: from sage.all import GaussValuation
+            sage: from sage.rings.valuation.gauss_valuation import GaussValuation
             sage: F.<x> = FunctionField(QQ)
             sage: v_2 = QQ.valuation(2)
             sage: X = BerkovichLine(F, v_2)
diff --git a/mclf/berkovich/berkovich_path.py b/mclf/berkovich/berkovich_path.py
index 18a2545..6c5468e 100644
--- a/mclf/berkovich/berkovich_path.py
+++ b/mclf/berkovich/berkovich_path.py
@@ -49,7 +49,8 @@
 #                  https://www.gnu.org/licenses/
 # ****************************************************************************
 
-from sage.all import SageObject, Infinity
+from sage.structure.sage_object import SageObject
+from sage.rings.infinity import Infinity
 from mclf.berkovich.type_V_points import TypeVPointOnBerkovichLine
 
 
diff --git a/mclf/berkovich/berkovich_path_old.py b/mclf/berkovich/berkovich_path_old.py
index 8c40dfe..7f38dcf 100644
--- a/mclf/berkovich/berkovich_path_old.py
+++ b/mclf/berkovich/berkovich_path_old.py
@@ -49,7 +49,8 @@
 #                  https://www.gnu.org/licenses/
 # ***************************************************************************
 
-from sage.all import SageObject, Infinity
+from sage.structure.sage_object import SageObject
+from sage.rings.infinity import Infinity
 from mclf.berkovich.type_V_points import TypeVPointOnBerkovichLine
 
 
diff --git a/mclf/berkovich/berkovich_trees.py b/mclf/berkovich/berkovich_trees.py
index 915c500..a50d0eb 100644
--- a/mclf/berkovich/berkovich_trees.py
+++ b/mclf/berkovich/berkovich_trees.py
@@ -46,7 +46,8 @@
 #                  https://www.gnu.org/licenses/
 # *****************************************************************************
 
-from sage.all import SageObject, Graph
+from sage.structure.sage_object import SageObject
+from sage.graphs.graph import Graph
 
 
 class BerkovichTree(SageObject):
diff --git a/mclf/berkovich/piecewise_affine_functions.py b/mclf/berkovich/piecewise_affine_functions.py
index 0470bec..046d921 100644
--- a/mclf/berkovich/piecewise_affine_functions.py
+++ b/mclf/berkovich/piecewise_affine_functions.py
@@ -109,7 +109,9 @@
 #                  https://www.gnu.org/licenses/
 # *****************************************************************************
 
-from sage.all import SageObject, Infinity, cached_method
+from sage.structure.sage_object import SageObject
+from sage.rings.infinity import Infinity
+from sage.misc.cachefunc import cached_method
 
 
 class Domain(SageObject):
diff --git a/mclf/berkovich/type_V_points.py b/mclf/berkovich/type_V_points.py
index ec155ee..71530c4 100644
--- a/mclf/berkovich/type_V_points.py
+++ b/mclf/berkovich/type_V_points.py
@@ -69,7 +69,9 @@
 #                  https://www.gnu.org/licenses/
 # *****************************************************************************
 
-from sage.all import SageObject, Infinity, cached_method
+from sage.structure.sage_object import SageObject
+from sage.rings.infinity import Infinity
+from sage.misc.cachefunc import cached_method
 # from sage.misc.cachefunc import cached_method
 
 
diff --git a/mclf/curves/morphisms_of_smooth_projective_curves.py b/mclf/curves/morphisms_of_smooth_projective_curves.py
index 5fb65af..45744a5 100644
--- a/mclf/curves/morphisms_of_smooth_projective_curves.py
+++ b/mclf/curves/morphisms_of_smooth_projective_curves.py
@@ -78,7 +78,7 @@
 #                  https://www.gnu.org/licenses/
 # ***************************************************************************
 
-from sage.all import SageObject
+from sage.structure.sage_object import SageObject
 from mclf.curves.smooth_projective_curves import PointOnSmoothProjectiveCurve
 
 
diff --git a/mclf/curves/picard_curves.py b/mclf/curves/picard_curves.py
index 8e520c2..351ec0f 100644
--- a/mclf/curves/picard_curves.py
+++ b/mclf/curves/picard_curves.py
@@ -47,7 +47,9 @@
 #                  https://www.gnu.org/licenses/
 # ***************************************************************************
 
-from sage.all import ZZ, FunctionField, PolynomialRing
+from sage.rings.integer_ring import Z as ZZ
+from sage.rings.function_field.constructor import FunctionField
+from sage.rings.polynomial.polynomial_ring_constructor import PolynomialRing
 from mclf.curves.superelliptic_curves import SuperellipticCurve
 
 
diff --git a/mclf/curves/smooth_projective_curves.py b/mclf/curves/smooth_projective_curves.py
index d542235..47db60c 100644
--- a/mclf/curves/smooth_projective_curves.py
+++ b/mclf/curves/smooth_projective_curves.py
@@ -133,7 +133,13 @@
 #                  https://www.gnu.org/licenses/
 # *****************************************************************************
 
-from sage.all import lcm, SageObject, Infinity, ZZ, PolynomialRing, randint, PowerSeriesRing
+from sage.arith.functions import lcm
+from sage.misc.prandom import randint
+from sage.rings.infinity import Infinity
+from sage.rings.integer_ring import ZZ
+from sage.rings.polynomial.polynomial_ring_constructor import PolynomialRing
+from sage.rings.power_series_ring import PowerSeriesRing
+from sage.structure.sage_object import SageObject
 
 
 class SmoothProjectiveCurve(SageObject):
@@ -1425,7 +1431,7 @@ def field_of_constant_degree_of_polynomial(G, return_field=False):
             return d
     elif K in NumberFields():
         from sage.rings.integer_ring import ZZ
-        from sage.rings.all import GaussValuation
+        from sage.rings.valuation.gauss_valuation import GaussValuation
         if return_field:
             raise NotImplementedError('Computation of field of constants for number fields is not yet implemented.')
         d = n
diff --git a/mclf/curves/superelliptic_curves.py b/mclf/curves/superelliptic_curves.py
index 6a48112..17f009d 100644
--- a/mclf/curves/superelliptic_curves.py
+++ b/mclf/curves/superelliptic_curves.py
@@ -65,7 +65,10 @@
 #                  https://www.gnu.org/licenses/
 # ***************************************************************************
 
-from sage.all import ZZ, gcd, FunctionField, PolynomialRing
+from sage.rings.integer_ring import Z as ZZ
+from sage.arith.misc import GCD as gcd
+from sage.rings.function_field.constructor import FunctionField
+from sage.rings.polynomial.polynomial_ring_constructor import PolynomialRing
 from mclf.curves.smooth_projective_curves import SmoothProjectiveCurve
 
 
diff --git a/mclf/monkey/trac_24533.py b/mclf/monkey/trac_24533.py
index 24d4490..3146c7c 100644
--- a/mclf/monkey/trac_24533.py
+++ b/mclf/monkey/trac_24533.py
@@ -17,7 +17,9 @@ class Monkey(AbstractMonkey):
     _trac = "https://trac.sagemath.org/ticket/24533"
 
     def _test(self):
-        from sage.all import GF, FunctionField, PolynomialRing
+        from sage.rings.finite_rings.finite_field_constructor import FiniteField as GF
+        from sage.rings.function_field.constructor import FunctionField
+        from sage.rings.polynomial.polynomial_ring_constructor import PolynomialRing
         k = GF(4)
         a = k.gen()
         R = PolynomialRing(k, 'b')
diff --git a/mclf/monkey/trac_25294.py b/mclf/monkey/trac_25294.py
index 040a7b0..a7c013e 100644
--- a/mclf/monkey/trac_25294.py
+++ b/mclf/monkey/trac_25294.py
@@ -17,7 +17,9 @@ class Monkey(AbstractMonkey):
     _trac = "https://trac.sagemath.org/ticket/25294"
 
     def _test(self):
-        from sage.all import FunctionField, QQ, PolynomialRing
+        from sage.rings.function_field.constructor import FunctionField
+        from sage.rings.rational_field import Q as QQ
+        from sage.rings.polynomial.polynomial_ring_constructor import PolynomialRing
         K = FunctionField(QQ, 'x')
         x = K.gen()
         R = PolynomialRing(K, 'y')
diff --git a/mclf/monkey/trac_25360.py b/mclf/monkey/trac_25360.py
index 7e301ec..e3fbc97 100644
--- a/mclf/monkey/trac_25360.py
+++ b/mclf/monkey/trac_25360.py
@@ -17,7 +17,9 @@ class Monkey(AbstractMonkey):
     _trac = "https://trac.sagemath.org/ticket/25360"
 
     def _test(self):
-        from sage.all import GF, PolynomialRing, proof
+        from sage.rings.finite_rings.finite_field_constructor import FiniteField as GF
+        from sage.rings.polynomial.polynomial_ring_constructor import PolynomialRing
+        import sage.structure.proof.all as proof
         k = GF(4, 'u')
         u = k.gen()
         R = PolynomialRing(k, 'v')
diff --git a/mclf/monkey/trac_25440.py b/mclf/monkey/trac_25440.py
index ce448fb..fe5ede2 100644
--- a/mclf/monkey/trac_25440.py
+++ b/mclf/monkey/trac_25440.py
@@ -17,7 +17,11 @@ class Monkey(AbstractMonkey):
     _trac = "https://trac.sagemath.org/ticket/25440"
 
     def _test(self):
-        from sage.all import PolynomialRing, QQ, NumberField, GaussValuation, FunctionField
+        from sage.rings.polynomial.polynomial_ring_constructor import PolynomialRing
+        from sage.rings.rational_field import Q as QQ
+        from sage.rings.number_field.number_field import NumberField
+        from sage.rings.valuation.gauss_valuation import GaussValuation
+        from sage.rings.function_field.constructor import FunctionField
         R = PolynomialRing(QQ, 'x')
         x = R.gen()
         K = NumberField(x**6 + 126*x**3 + 126, 'pi')
diff --git a/mclf/monkey/trac_25441.py b/mclf/monkey/trac_25441.py
index 788b66f..89c51a5 100644
--- a/mclf/monkey/trac_25441.py
+++ b/mclf/monkey/trac_25441.py
@@ -17,7 +17,10 @@ class Monkey(AbstractMonkey):
     _trac = "https://trac.sagemath.org/ticket/25441"
 
     def _test(self):
-        from sage.all import QQ, PolynomialRing, GaussValuation, FunctionField
+        from sage.rings.rational_field import Q as QQ
+        from sage.rings.polynomial.polynomial_ring_constructor import PolynomialRing
+        from sage.rings.valuation.gauss_valuation import GaussValuation
+        from sage.rings.function_field.constructor import FunctionField
         R = PolynomialRing(QQ, 'x')
         x = R.gen()
         v = GaussValuation(R, QQ.valuation(2))
diff --git a/mclf/monkey/trac_26066.py b/mclf/monkey/trac_26066.py
index 9141767..0152485 100644
--- a/mclf/monkey/trac_26066.py
+++ b/mclf/monkey/trac_26066.py
@@ -17,7 +17,9 @@ class Monkey(AbstractMonkey):
     _trac = "https://trac.sagemath.org/ticket/26066"
 
     def _test(self):
-        from sage.all import QQ, PolynomialRing, GaussValuation
+        from sage.rings.rational_field import Q as QQ
+        from sage.rings.polynomial.polynomial_ring_constructor import PolynomialRing
+        from sage.rings.valuation.gauss_valuation import GaussValuation
         R = PolynomialRing(QQ, 'x')
         x = R.gen()
         v = QQ.valuation(2)
diff --git a/mclf/padic_extensions/elements_of_fake_padic_completion.py b/mclf/padic_extensions/elements_of_fake_padic_completion.py
index aa53f3d..a417b0b 100644
--- a/mclf/padic_extensions/elements_of_fake_padic_completion.py
+++ b/mclf/padic_extensions/elements_of_fake_padic_completion.py
@@ -27,7 +27,7 @@
 #                  https://www.gnu.org/licenses/
 # ***************************************************************************
 
-from sage.all import SageObject
+from sage.structure.sage_object import SageObject
 
 
 class ElementOfFakepAdicCompletion(SageObject):
diff --git a/mclf/padic_extensions/fake_padic_completions.py b/mclf/padic_extensions/fake_padic_completions.py
index 4be320b..a8d712c 100644
--- a/mclf/padic_extensions/fake_padic_completions.py
+++ b/mclf/padic_extensions/fake_padic_completions.py
@@ -85,9 +85,24 @@
 # ****************************************************************************
 
 
-from sage.all import SageObject, ZZ, QQ, NumberField, GaussValuation, PolynomialRing, Polynomial, Integer, matrix, IntegerModRing, mod, Infinity, prod, lcm, vector, GF
+from sage.structure.sage_object import SageObject
+from sage.rings.integer_ring import Z as ZZ
+from sage.rings.rational_field import Q as QQ
+from sage.rings.number_field.number_field import NumberField
+from sage.rings.valuation.gauss_valuation import GaussValuation
+from sage.rings.polynomial.polynomial_ring_constructor import PolynomialRing
+from sage.rings.polynomial.polynomial_element import Polynomial
+from sage.rings.integer import Integer
+from sage.matrix.constructor import Matrix as matrix
+from sage.rings.finite_rings.integer_mod_ring import IntegerModRing
+from sage.rings.infinity import Infinity
+from sage.misc.misc_c import prod
+from sage.arith.functions import lcm
+from sage.modules.free_module_element import free_module_element as vector
+from sage.rings.finite_rings.finite_field_constructor import FiniteField as GF
 from sage.geometry.newton_polygon import NewtonPolygon
 from sage.rings.valuation.limit_valuation import LimitValuation
+from sage.rings.finite_rings.integer_mod import mod
 
 
 class FakepAdicCompletion(SageObject):
diff --git a/mclf/padic_extensions/fake_padic_embeddings.py b/mclf/padic_extensions/fake_padic_embeddings.py
index 1ac4864..2079921 100644
--- a/mclf/padic_extensions/fake_padic_embeddings.py
+++ b/mclf/padic_extensions/fake_padic_embeddings.py
@@ -50,7 +50,10 @@ class ``FakepAdicCompletion``. This means that `K` and `L` represented as pairs
 #                  https://www.gnu.org/licenses/
 # ***************************************************************************
 
-from sage.all import SageObject, PolynomialRing, Infinity, GaussValuation
+from sage.structure.sage_object import SageObject
+from sage.rings.polynomial.polynomial_ring_constructor import PolynomialRing
+from sage.rings.infinity import Infinity
+from sage.rings.valuation.gauss_valuation import GaussValuation
 from sage.rings.valuation.limit_valuation import MacLaneLimitValuation, LimitValuation
 
 
diff --git a/mclf/padic_extensions/fake_padic_extensions.py b/mclf/padic_extensions/fake_padic_extensions.py
index 0a0d97e..1bdeabd 100644
--- a/mclf/padic_extensions/fake_padic_extensions.py
+++ b/mclf/padic_extensions/fake_padic_extensions.py
@@ -47,7 +47,8 @@
 #                  https://www.gnu.org/licenses/
 # ****************************************************************************
 
-from sage.all import SageObject, ZZ
+from sage.structure.sage_object import SageObject
+from sage.rings.integer_ring import Z as ZZ
 
 
 class FakepAdicExtension(SageObject):
diff --git a/mclf/padic_extensions/slope_factors.py b/mclf/padic_extensions/slope_factors.py
index 307f826..314b4e1 100644
--- a/mclf/padic_extensions/slope_factors.py
+++ b/mclf/padic_extensions/slope_factors.py
@@ -50,7 +50,8 @@
 #                  https://www.gnu.org/licenses/
 # ***************************************************************************
 
-from sage.all import ZZ, GaussValuation
+from sage.rings.integer_ring import Z as ZZ
+from sage.rings.valuation.gauss_valuation import GaussValuation
 from sage.geometry.newton_polygon import NewtonPolygon
 
 
@@ -86,7 +87,7 @@ def slope_factors(f, vK, precision, reduce_function, slope_bound=0):
 
         sage: from mclf.padic_extensions.slope_factors import slope_factors
         sage: from mclf.padic_extensions.fake_padic_completions import FakepAdicCompletion
-        sage: from sage.all import GaussValuation
+        sage: from sage.rings.valuation.gauss_valuation import GaussValuation
         sage: R.<x> = QQ[]
         sage: v2 = QQ.valuation(2)
         sage: Q2 = FakepAdicCompletion(QQ, v2)
diff --git a/mclf/padic_extensions/weak_padic_galois_extensions.py b/mclf/padic_extensions/weak_padic_galois_extensions.py
index c26b1c3..ab647eb 100644
--- a/mclf/padic_extensions/weak_padic_galois_extensions.py
+++ b/mclf/padic_extensions/weak_padic_galois_extensions.py
@@ -98,7 +98,11 @@
 # ****************************************************************************
 
 
-from sage.all import PolynomialRing, Polynomial, ZZ, QQ, prod
+from sage.rings.polynomial.polynomial_ring_constructor import PolynomialRing
+from sage.rings.polynomial.polynomial_element import Polynomial
+from sage.rings.integer_ring import Z as ZZ
+from sage.rings.rational_field import Q as QQ
+from sage.misc.misc_c import prod
 from sage.geometry.newton_polygon import NewtonPolygon
 from mclf.padic_extensions.fake_padic_completions import FakepAdicCompletion
 from mclf.padic_extensions.fake_padic_extensions import FakepAdicExtension
diff --git a/mclf/semistable_reduction/reduction_trees.py b/mclf/semistable_reduction/reduction_trees.py
index 84dbd08..5f03f5a 100644
--- a/mclf/semistable_reduction/reduction_trees.py
+++ b/mclf/semistable_reduction/reduction_trees.py
@@ -134,7 +134,11 @@
 #                  https://www.gnu.org/licenses/
 # *****************************************************************************
 
-from sage.all import ZZ, QQ, FunctionField, SageObject, Infinity
+from sage.rings.integer_ring import Z as ZZ
+from sage.rings.rational_field import Q as QQ
+from sage.rings.function_field.constructor import FunctionField
+from sage.structure.sage_object import SageObject
+from sage.rings.infinity import Infinity
 from mclf.berkovich.berkovich_line import BerkovichLine
 from mclf.berkovich.type_V_points import TypeVPointOnBerkovichLine
 from mclf.berkovich.affinoid_domain import ElementaryAffinoidOnBerkovichLine
@@ -543,7 +547,7 @@ def splitting_field(self, check=False):
             the closed unit disk.
 
         """
-        from sage.all import PolynomialRing
+        from sage.rings.polynomial.polynomial_ring_constructor import PolynomialRing
 
         if not hasattr(self, "_splitting_field"):
             vK = self.reduction_tree().base_valuation()
diff --git a/mclf/semistable_reduction/semistable_models.py b/mclf/semistable_reduction/semistable_models.py
index 3cdf3b3..040fd81 100644
--- a/mclf/semistable_reduction/semistable_models.py
+++ b/mclf/semistable_reduction/semistable_models.py
@@ -139,7 +139,7 @@
 #                  https://www.gnu.org/licenses/
 # ***************************************************************************
 
-from sage.all import SageObject
+from sage.structure.sage_object import SageObject
 from mclf.curves.superelliptic_curves import SuperellipticCurve
 
 
diff --git a/mclf/semistable_reduction/superp_models.py b/mclf/semistable_reduction/superp_models.py
index 210033c..db8428e 100644
--- a/mclf/semistable_reduction/superp_models.py
+++ b/mclf/semistable_reduction/superp_models.py
@@ -135,7 +135,10 @@
 #                  https://www.gnu.org/licenses/
 # *****************************************************************************
 
-from sage.all import PolynomialRing, FunctionField, floor, GaussValuation
+from sage.rings.polynomial.polynomial_ring_constructor import PolynomialRing
+from sage.rings.function_field.constructor import FunctionField
+from sage.functions.other import floor
+from sage.rings.valuation.gauss_valuation import GaussValuation
 from mclf.berkovich.berkovich_line import BerkovichLine
 from mclf.berkovich.berkovich_trees import BerkovichTree
 # from mclf.berkovich.affinoid_domain import ClosedUnitDisk
diff --git a/setup.py b/setup.py
index 3f0fec9..d7adfab 100644
--- a/setup.py
+++ b/setup.py
@@ -24,5 +24,16 @@
         "Programming Language :: Python :: 2",
         "Programming Language :: Python :: 3",
         "Topic :: Scientific/Engineering :: Mathematics",
-        "Operating System :: OS Independent")
+        "Operating System :: OS Independent"),
+    extras_require={
+        'passagemath': [
+            'passagemath-flint',
+            'passagemath-graphs',
+            'passagemath-modules',
+            'passagemath-pari',
+            'passagemath-polyhedra',
+            'passagemath-repl',
+            'passagemath-singular',
+        ],
+    },
 )
diff --git a/tox.ini b/tox.ini
new file mode 100644
index 0000000..eca0543
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,22 @@
+[tox]
+envlist = passagemath
+
+[testenv:.pkg]
+passenv =
+    CPATH
+    LIBRARY_PATH
+
+[testenv:passagemath]
+usedevelop = True
+extras = passagemath
+
+passenv =
+    CPATH
+    LIBRARY_PATH
+
+setenv =
+    # For access to _doctest_environment.py
+    PYTHONPATH=.
+
+commands =
+    sage -tp --force-lib --environment=_doctest_environment mclf