diff --git a/spot/twaalgos/remfin.cc b/spot/twaalgos/remfin.cc
index 646db08e5..0b9bb3cc9 100644
--- a/spot/twaalgos/remfin.cc
+++ b/spot/twaalgos/remfin.cc
@@ -273,7 +273,8 @@ namespace spot
                       state_map[s] = base++;
                   for (const auto& e: si.inner_edges_of(scc))
                     {
-                      if (e.acc.has(r) || accedge[aut->edge_number(e)])
+                      unsigned en = aut->edge_number(e);
+                      if ((e.acc | propmarks[en]).has(r) || accedge[en])
                         continue;
                       auto src = state_map[e.src];
                       auto dst = state_map[e.dst];
diff --git a/tests/core/det.test b/tests/core/det.test
index e30f2b873..7f4fe1eea 100755
--- a/tests/core/det.test
+++ b/tests/core/det.test
@@ -1,6 +1,6 @@
 #!/bin/sh
 # -*- coding: utf-8 -*-
-# Copyright (C) 2013-2019 Laboratoire de Recherche et Développement de
+# Copyright (C) 2013-2020 Laboratoire de Recherche et Développement de
 # l'Epita (LRDE).
 #
 # This file is part of Spot, a model checking library.
@@ -94,16 +94,13 @@ State: 0
 State: 1
 [!0] 0
 [0] 2
-[!0] 3
 State: 2
 [!0] 0
 [0] 2
-[!0] 3
 [0] 4
 State: 3 {0}
 [!0] 3
 State: 4 {0}
-[!0] 3
 [0] 4
 --END--
 EOF
diff --git a/tests/core/remfin.test b/tests/core/remfin.test
index 441fb21ea..6de24007d 100755
--- a/tests/core/remfin.test
+++ b/tests/core/remfin.test
@@ -752,7 +752,7 @@ State: 1 {0}
 [!0] 0
 --END--
 HOA: v1
-States: 21
+States: 19
 Start: 0
 AP: 2 "p0" "p1"
 acc-name: Buchi
@@ -768,20 +768,19 @@ State: 1
 [0&!1] 6
 [0&1] 9
 [!0&1] 14
-[!0&1] 20
+[!0&1] 18
 State: 2
 [!0&!1] 1
 [!0&1] 8
-[!0&!1] 20
+[!0&!1] 18
 State: 3
 [0&1] 2
 [!0&1] 5
-[0&1] 18
 State: 4
 [0&!1] 4
 [0&1] 5
 [0&1] 6
-[0&!1] 17
+[0&!1] 16
 State: 5
 [0&1] 9
 State: 6
@@ -789,7 +788,6 @@ State: 6
 [0&1] 5
 [!0&1] 9
 [!0&1] 12
-[!0&1] 17
 State: 7 {0}
 [0&!1] 3
 [!0&1] 5
@@ -799,15 +797,12 @@ State: 8
 [!0&!1] 3
 [!0&1] 4
 [!0&1] 8
-[!0&1] 12
 [!0&1] 13
-[!0&1] 17
-[!0&!1] 19
 State: 9
 [!0&1] 2
 [0&!1] 6
 [0&!1] 11
-[!0&1] 18
+[!0&1] 17
 State: 10 {0}
 [0&!1] 11
 State: 11 {0}
@@ -816,25 +811,18 @@ State: 11 {0}
 State: 12 {0}
 [0&1] 11
 State: 13 {0}
-[!0&1] 12
 [!0&1] 13
 State: 14 {0}
 [!0&1] 14
 State: 15 {0}
-[0&1] 16
+[!0&1] 17
 State: 16 {0}
-[!0&1] 18
+[0&!1] 16
 State: 17 {0}
-[0&1] 15
-[0&!1] 17
+[!0&!1] 18
 State: 18 {0}
-[!0&!1] 20
-State: 19 {0}
-[!0&1] 15
-[0&1] 18
-State: 20 {0}
-[0&1] 16
-[!0&1] 20
+[0&1] 15
+[!0&1] 18
 --END--
 HOA: v1
 States: 4
@@ -1341,7 +1329,7 @@ State: 1 {0}
 [0] 1
 --END--
 HOA: v1
-States: 21
+States: 19
 Start: 0
 AP: 2 "p0" "p1"
 acc-name: Buchi
@@ -1357,20 +1345,19 @@ State: 1
 [0&!1] 6
 [0&1] 9
 [!0&1] 14
-[!0&1] 20
+[!0&1] 18
 State: 2
 [!0&!1] 1
 [!0&1] 8
-[!0&!1] 20
+[!0&!1] 18
 State: 3
 [0&1] 2
 [!0&1] 5
-[0&1] 18
 State: 4
 [0&!1] 4
 [0&1] 5
 [0&1] 6
-[0&!1] 17
+[0&!1] 16
 State: 5
 [0&1] 9
 State: 6
@@ -1378,7 +1365,6 @@ State: 6
 [0&1] 5
 [!0&1] 9
 [!0&1] 12
-[!0&1] 17
 State: 7
 [0&!1] 3
 [!0&1] 5
@@ -1388,15 +1374,12 @@ State: 8
 [!0&!1] 3
 [!0&1] 4
 [!0&1] 8
-[!0&1] 12
 [!0&1] 13
-[!0&1] 17
-[!0&!1] 19
 State: 9
 [!0&1] 2
 [0&!1] 6
 [0&!1] 11
-[!0&1] 18
+[!0&1] 17
 State: 10
 [0&!1] 11 {0}
 State: 11
@@ -1405,25 +1388,18 @@ State: 11
 State: 12
 [0&1] 11 {0}
 State: 13
-[!0&1] 12
 [!0&1] 13 {0}
 State: 14
 [!0&1] 14 {0}
 State: 15
-[0&1] 16
+[!0&1] 17 {0}
 State: 16
-[!0&1] 18 {0}
+[0&!1] 16 {0}
 State: 17
-[0&1] 15
-[0&!1] 17 {0}
+[!0&!1] 18 {0}
 State: 18
-[!0&!1] 20 {0}
-State: 19
-[!0&1] 15
-[0&1] 18
-State: 20
-[0&1] 16 {0}
-[!0&1] 20 {0}
+[0&1] 15 {0}
+[!0&1] 18 {0}
 --END--
 HOA: v1
 States: 4
diff --git a/tests/python/automata.ipynb b/tests/python/automata.ipynb
index f0b95a995..061ab1838 100644
--- a/tests/python/automata.ipynb
+++ b/tests/python/automata.ipynb
@@ -178,7 +178,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f1940090f00> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f65f48a3f90> >"
       ]
      },
      "execution_count": 2,
@@ -657,7 +657,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f1940108e10> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f65f4901f90> >"
       ]
      },
      "execution_count": 6,
@@ -733,7 +733,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f1940108870> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f65f48b2540> >"
       ]
      },
      "execution_count": 7,
@@ -816,7 +816,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f1940108ab0> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f65f60e46c0> >"
       ]
      },
      "execution_count": 8,
@@ -1349,7 +1349,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f194009f600> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f65f48b2660> >"
       ]
      },
      "execution_count": 12,
@@ -1463,7 +1463,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f19401080f0> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f65f48c1180> >"
       ]
      },
      "execution_count": 13,
@@ -1594,7 +1594,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f19400ad270> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f65f48c15d0> >"
       ]
      },
      "execution_count": 14,
@@ -1816,7 +1816,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f19400b1480> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f65f48c66f0> >"
       ]
      },
      "metadata": {},
@@ -1831,178 +1831,164 @@
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        "</g>\n",
        "</g>\n",
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f19400b1420> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f65f48c6960> >"
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@@ -2518,7 +2483,7 @@
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       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f19400b18a0> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f65f48c6cc0> >"
       ]
      },
      "execution_count": 19,
@@ -2594,7 +2559,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f19400b1e70> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f65f48ca1b0> >"
       ]
      },
      "execution_count": 20,
@@ -3144,7 +3109,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f19402232a0> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f65f48c1060> >"
       ]
      },
      "metadata": {},
@@ -3244,7 +3209,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f1940108f60> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f65f48c1900> >"
       ]
      },
      "execution_count": 24,
@@ -3317,7 +3282,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f19400b1bd0> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f65f4901900> >"
       ]
      },
      "execution_count": 25,
@@ -3488,7 +3453,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f19400b8b40> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f65f48c6060> >"
       ]
      },
      "execution_count": 27,
@@ -3571,7 +3536,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f19402232a0> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f65f48c1060> >"
       ]
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@@ -3636,7 +3601,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f19402232a0> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f65f48c1060> >"
       ]
      },
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@@ -3723,7 +3688,7 @@
        "</svg>\n"
       ],
       "text/plain": [
-       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f19402232a0> >"
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f65f48c1060> >"
       ]
      },
      "execution_count": 29,
@@ -3756,7 +3721,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.8.2"
+   "version": "3.8.5"
   }
  },
  "nbformat": 4,
diff --git a/tests/python/remfin.py b/tests/python/remfin.py
index 7eb9ab4d2..4cede285c 100644
--- a/tests/python/remfin.py
+++ b/tests/python/remfin.py
@@ -92,4 +92,4 @@ State: 2
 """)
 b = spot.remove_fin(a)
 size = (b.num_states(), b.num_edges())
-assert size == (5, 17);
+assert size == (5, 15);
diff --git a/tests/python/tra2tba.py b/tests/python/tra2tba.py
index 2cb1bfb5c..59ce3ab63 100644
--- a/tests/python/tra2tba.py
+++ b/tests/python/tra2tba.py
@@ -536,7 +536,6 @@ State: 0
 State: 1
 [!0] 0
 [0] 1
-[!0] 3
 State: 2 {0}
 [!0] 2
 State: 3 {0}