diff --git a/tests/test_bmat8.cpp b/tests/test_bmat8.cpp
index e14dd95f..a3b4908f 100644
--- a/tests/test_bmat8.cpp
+++ b/tests/test_bmat8.cpp
@@ -517,37 +517,37 @@ TEST_CASE_METHOD(BMat8Fixture, "BMat8::nr_rows", "[BMat8][025]") {
     REQUIRE(BMat8({{1, 0, 1}, {1, 1, 0}, {0, 0, 0}}).nr_rows() == 2);
 }
 
-// TEST_CASE("BMat8::right_perm_action_on_basis_ref", "[BMat8][026]") {
-//     BMat8 m1({{1, 1, 0}, {1, 0, 1}, {0, 0, 0}});
-//     BMat8 m2({{0, 0, 0}, {1, 0, 1}, {1, 1, 0}});
-//     REQUIRE(m1.right_perm_action_on_basis_ref(m2) == Perm16({1,0}));
-//     REQUIRE(m1.right_perm_action_on_basis(m2) == Perm16({1,0}));
-//
-//     m1 = BMat8({{1, 1, 0, 1}, {1, 0, 1, 0}, {0, 0, 0, 1}, {0, 0, 0, 0}});
-//     m2 = BMat8({{1, 0, 0, 0}, {0, 1, 0, 1}, {1, 0, 1, 0}, {0, 0, 0, 1}});
-//     REQUIRE(m1.right_perm_action_on_basis_ref(m2) == Perm16::one());
-//     REQUIRE(m1.right_perm_action_on_basis(m2) == Perm16::one());
-//
-//     m1 = BMat8({{1, 1, 0, 1}, {1, 0, 1, 0}, {0, 0, 0, 1}, {0, 0, 0, 0}});
-//     m2 = BMat8({{0, 0, 0, 0}, {1, 1, 0, 1}, {1, 0, 1, 0}, {0, 0, 0, 1}});
-//     REQUIRE(m1.right_perm_action_on_basis_ref(m2) == Perm16::one());
-//     REQUIRE(m1.right_perm_action_on_basis(m2) == Perm16::one());
-//
-//     m1 = BMat8({{0,1,0,0}, {0,0,1,0}, {1,0,0,1}, {0,0,0,0}});
-//     m2 = BMat8({{1,0,0,1}, {0,0,1,0}, {0,1,0,0}, {0,0,0,1}});
-//     REQUIRE(m1.right_perm_action_on_basis_ref(m2) == Perm16({1,0}));
-//     REQUIRE(m1.right_perm_action_on_basis(m2) == Perm16({1,0}));
-//
-//     m1 = BMat8({{0,0,0,1}, {1,0,0,0}, {0,0,1,0}, {0,1,0,0}});
-//     m2 = BMat8({{0,1,0,0}, {0,0,1,0}, {1,0,0,0}, {0,0,0,1}});
-//     REQUIRE(m1.right_perm_action_on_basis_ref(m2) == Perm16({0,2,3,1}));
-//     REQUIRE(m1.right_perm_action_on_basis(m2) == Perm16({0,2,3,1}));
-//
-//
-//     m1 = BMat8({{0,0,0,1}, {0,0,1,0}, {0,1,0,0}, {1,0,0,0}});
-//     m2 = BMat8({{0,1,0,0}, {0,0,0,1}, {1,0,0,0}, {0,0,1,0}});
-//     REQUIRE(m1.right_perm_action_on_basis_ref(m2) == Perm16({2,0,3,1}));
-//     REQUIRE(m1.right_perm_action_on_basis(m2) == Perm16({2,0,3,1}));
-// }
+TEST_CASE("BMat8::right_perm_action_on_basis_ref", "[BMat8][026]") {
+    BMat8 m1({{1, 1, 0}, {1, 0, 1}, {0, 0, 0}});
+    BMat8 m2({{0, 0, 0}, {1, 0, 1}, {1, 1, 0}});
+    REQUIRE(m1.right_perm_action_on_basis_ref(m2) == Perm16({1,0}));
+    REQUIRE(m1.right_perm_action_on_basis(m2) == Perm16({1,0}));
+
+    m1 = BMat8({{1, 1, 0, 1}, {1, 0, 1, 0}, {0, 0, 0, 1}, {0, 0, 0, 0}});
+    m2 = BMat8({{1, 0, 0, 0}, {0, 1, 0, 1}, {1, 0, 1, 0}, {0, 0, 0, 1}});
+    REQUIRE(m1.right_perm_action_on_basis_ref(m2) == Perm16::one());
+    REQUIRE(m1.right_perm_action_on_basis(m2) == Perm16::one());
+
+    m1 = BMat8({{1, 1, 0, 1}, {1, 0, 1, 0}, {0, 0, 0, 1}, {0, 0, 0, 0}});
+    m2 = BMat8({{0, 0, 0, 0}, {1, 1, 0, 1}, {1, 0, 1, 0}, {0, 0, 0, 1}});
+    REQUIRE(m1.right_perm_action_on_basis_ref(m2) == Perm16::one());
+    REQUIRE(m1.right_perm_action_on_basis(m2) == Perm16::one());
+
+    m1 = BMat8({{0,1,0,0}, {0,0,1,0}, {1,0,0,1}, {0,0,0,0}});
+    m2 = BMat8({{1,0,0,1}, {0,0,1,0}, {0,1,0,0}, {0,0,0,1}});
+    REQUIRE(m1.right_perm_action_on_basis_ref(m2) == Perm16({1,0}));
+    REQUIRE(m1.right_perm_action_on_basis(m2) == Perm16({1,0}));
+
+    m1 = BMat8({{0,0,0,1}, {1,0,0,0}, {0,0,1,0}, {0,1,0,0}});
+    m2 = BMat8({{0,1,0,0}, {0,0,1,0}, {1,0,0,0}, {0,0,0,1}});
+    REQUIRE(m1.right_perm_action_on_basis_ref(m2) == Perm16({0,2,3,1}));
+    REQUIRE(m1.right_perm_action_on_basis(m2) == Perm16({0,2,3,1}));
+
+
+    m1 = BMat8({{0,0,0,1}, {0,0,1,0}, {0,1,0,0}, {1,0,0,0}});
+    m2 = BMat8({{0,1,0,0}, {0,0,0,1}, {1,0,0,0}, {0,0,1,0}});
+    REQUIRE(m1.right_perm_action_on_basis_ref(m2) == Perm16({2,0,3,1}));
+    REQUIRE(m1.right_perm_action_on_basis(m2) == Perm16({2,0,3,1}));
+}
 
 }  // namespace HPCombi