diff --git a/PackageInfo.g b/PackageInfo.g
index 16eaf77..82bd064 100644
--- a/PackageInfo.g
+++ b/PackageInfo.g
@@ -10,8 +10,8 @@ SetPackageInfo( rec(
 
 PackageName := "Vole",
 Subtitle := "Backtrack search in permutation groups with graphs",
-Version := "0.5.0",
-Date := "09/08/2021", # dd/mm/yyyy format
+Version := "0.5.1",
+Date := "15/08/2021", # dd/mm/yyyy format
 License := "MPL-2.0",
 
 Persons := [
diff --git a/tst/vole02.tst b/tst/vole02.tst
index 4fe003b..fb0d483 100644
--- a/tst/vole02.tst
+++ b/tst/vole02.tst
@@ -8,7 +8,7 @@
 # taken. Note that the XML file in turn may have been generated by AutoDoc
 # from some other input.
 #
-gap> START_TEST("vole02.tst");
+gap> START_TEST( "vole02.tst");
 
 # doc/_Chapter_install.xml:223-226
 gap> LoadPackage("vole", false);
@@ -23,4 +23,4 @@ gap> Vole.Intersection(A4, D8) = Group([ (1,2)(3,4), (1,4)(2,3) ]);
 true
 
 #
-gap> STOP_TEST("vole02.tst", 1);
+gap> STOP_TEST("vole02.tst", 1 );
diff --git a/tst/vole03.tst b/tst/vole03.tst
index 54aac6c..8764990 100644
--- a/tst/vole03.tst
+++ b/tst/vole03.tst
@@ -8,7 +8,7 @@
 # taken. Note that the XML file in turn may have been generated by AutoDoc
 # from some other input.
 #
-gap> START_TEST("vole03.tst");
+gap> START_TEST( "vole03.tst");
 
 # doc/_Chapter_tut.xml:16-21
 gap> M12 := MathieuGroup(12);;
@@ -72,4 +72,4 @@ gap> VoleFind.Group(VoleCon.InGroup(M12),
 true
 
 #
-gap> STOP_TEST("vole03.tst", 1);
+gap> STOP_TEST("vole03.tst", 1 );
diff --git a/tst/vole04.tst b/tst/vole04.tst
index 7a5dc46..1dc0c81 100644
--- a/tst/vole04.tst
+++ b/tst/vole04.tst
@@ -8,7 +8,7 @@
 # taken. Note that the XML file in turn may have been generated by AutoDoc
 # from some other input.
 #
-gap> START_TEST("vole04.tst");
+gap> START_TEST( "vole04.tst");
 
 # doc/_Chapter_wrapper.xml:96-104
 gap> LoadPackage("vole", false);;
@@ -125,4 +125,4 @@ gap> Vole.CanonicalDigraph(JohnsonDigraph(4,2));
 <immutable digraph with 6 vertices, 24 edges>
 
 #
-gap> STOP_TEST("vole04.tst", 1);
+gap> STOP_TEST("vole04.tst", 1 );
diff --git a/tst/vole05.tst b/tst/vole05.tst
index 54952a4..cc9129c 100644
--- a/tst/vole05.tst
+++ b/tst/vole05.tst
@@ -8,7 +8,7 @@
 # taken. Note that the XML file in turn may have been generated by AutoDoc
 # from some other input.
 #
-gap> START_TEST("vole05.tst");
+gap> START_TEST( "vole05.tst");
 
 # doc/_Chapter_interface.xml:40-44
 gap> LoadPackage("vole", false);;
@@ -118,4 +118,4 @@ gap> VoleFind.CanonicalPerm(SymmetricGroup(4),
 (1,2,3)
 
 #
-gap> STOP_TEST("vole05.tst", 1);
+gap> STOP_TEST("vole05.tst", 1 );
diff --git a/tst/vole06.tst b/tst/vole06.tst
index 00e2730..cd55d21 100644
--- a/tst/vole06.tst
+++ b/tst/vole06.tst
@@ -8,7 +8,7 @@
 # taken. Note that the XML file in turn may have been generated by AutoDoc
 # from some other input.
 #
-gap> START_TEST("vole06.tst");
+gap> START_TEST( "vole06.tst");
 
 # doc/_Chapter_Constraints.xml:103-109
 gap> LoadPackage("vole", false);;
@@ -110,4 +110,4 @@ gap> VoleFind.Rep(VoleCon.None());
 fail
 
 #
-gap> STOP_TEST("vole06.tst", 1);
+gap> STOP_TEST("vole06.tst", 1 );
diff --git a/tst/vole07.tst b/tst/vole07.tst
index 3141072..7ce2ad3 100644
--- a/tst/vole07.tst
+++ b/tst/vole07.tst
@@ -8,7 +8,7 @@
 # taken. Note that the XML file in turn may have been generated by AutoDoc
 # from some other input.
 #
-gap> START_TEST("vole07.tst");
+gap> START_TEST( "vole07.tst");
 
 # doc/_Chapter_Refiners.xml:27-34
 gap> LoadPackage("vole", false);;
@@ -19,4 +19,4 @@ gap> Set(RecNames(VoleRefiner));
   "TupleTransporter" ]
 
 #
-gap> STOP_TEST("vole07.tst", 1);
+gap> STOP_TEST("vole07.tst", 1 );