diff --git a/lib/modularity.pm b/lib/modularity.pm
new file mode 100644
index 00000000..ac3585d3
--- /dev/null
+++ b/lib/modularity.pm
@@ -0,0 +1,46 @@
+package modularity;
+
+use strict;
+
+use base 'Exporter';
+use Exporter;
+use lockapi;
+use testapi;
+use utils;
+
+our @EXPORT = qw(parse_module_list is_listed);
+
+# This subroutine takes the output from the dnf module list command
+# and deletes all unnecessary stuff and returns an array of hash 
+# references where each hash consists of (module, stream, profile).
+# The subroutine only recognizes one profile but it is enough
+# for the sake of the modularity testing.
+
+sub parse_module_list {
+    my $output = shift;
+    my @output_lines = split(/\n/, $output);
+    my @parsed_list;
+
+    foreach my $line (@output_lines) {
+        my ($module, $stream, $profile) = split(/\s+/, $line);
+        unless ($module =~ /Fedora|Last|Hint|Name|^$/) {
+            $profile =~ s/,$//;
+            my %module = ("module" => $module, "stream" => $stream, "profile" => $profile);
+            push(@parsed_list, \%module);
+        }
+    }
+    return @parsed_list;
+}
+
+# This subroutine iterates over the given list of module hashes and returns True
+# if it finds it in the list.
+sub is_listed {
+    my ($module, $stream, $listref) = @_;
+    my $found = 0;
+    foreach (@{ $listref }) {
+        if ($_->{module} eq $module and $_->{stream} eq $stream) {
+            $found = 1;
+        }
+    }
+    return $found;
+}
diff --git a/tests/modularity_enable_disable_module.pm b/tests/modularity_enable_disable_module.pm
index e4732292..77d7ffed 100644
--- a/tests/modularity_enable_disable_module.pm
+++ b/tests/modularity_enable_disable_module.pm
@@ -1,25 +1,72 @@
 use base "installedtest";
 use strict;
+use modularity;
 use testapi;
 use utils;
+
 sub run {
     my $self=shift;
     my $hook_run = 0;
     # switch to tty and login as root
     $self->root_console(tty=>3);
 
-    # Download the testing script
-    download_modularity_tests();
+    # Enable the module.
+    my $name = "swig";
+    my $stream = "4.0";
+    assert_script_run("dnf module enable -y $name:$stream");
 
-    # Check that modularity works, that a particular module is available in the system, 
-    # and display information about that module.
-    assert_script_run('/root/test.py -m dwm -s 6.1 -a list');
+    # Check that it is listed in the enabled list.
+    my $enabled = script_output('dnf module list --enabled');
+    my @enabled_modules = parse_module_list($enabled);
+    unless (is_listed($name, $stream, \@enabled_modules)) {
+        die "The enabled module is not listed in the list of enabled modules but it should be.";
+    }
 
-    # Check that module can be enabled and disabled.
-    assert_script_run('/root/test.py -m dwm -s 6.1 -a enable,disable -f hard');
+    # Check that it is not listed in the disabled list.
+    my $disabled = script_output('dnf module list --disabled');
+    my @disabled_modules = parse_module_list($disabled);
+    if (is_listed($name, $stream, \@disabled_modules)) {
+        die "The enabled module is listed in the list of disabled modules but it should not be.";
+    }
     
-    # Upload the modular log file.
-    upload_logs '/root/modular.log', failok=>1;
+    # Disable some other module.
+    my $name_alt = "postgresql";
+    my $stream_alt = "13";
+    assert_script_run("dnf module disable -y $name_alt:$stream_alt");
+
+    # Check that it is listed in the disabled list.
+    $disabled = script_output('dnf module list --disabled');
+    @disabled_modules = parse_module_list($disabled);
+    unless (is_listed($name_alt, $stream_alt, \@disabled_modules)) {
+        die "The disabled module is not listed in the list of disabled modules but it should be.";
+    }
+
+    # Check that it is not listed in the enabled list.
+    $enabled = script_output('dnf module list --enabled');
+    @enabled_modules = parse_module_list($enabled);
+    if (is_listed($name_alt, $stream_alt, \@enabled_modules)) {
+        die "The disabled module is listed in the list of enabled modules but it should not be.";
+    }
+
+    # Reset the first module to its original state and do the list checks.
+    assert_script_run("dnf module reset -y $name");
+    
+    # Check that the module has disappeared from both the lists.
+    $disabled = script_output('dnf module list --disabled');
+    @disabled_modules = parse_module_list($disabled);
+    if (is_listed($name, $stream, \@disabled_modules)) {
+        die "The disabled module is listed in the list of disabled modules but it should not be.";
+    }
+
+    $enabled = script_output('dnf module list --enabled');
+    @enabled_modules = parse_module_list($enabled);
+    if (is_listed($name, $stream, \@enabled_modules)) {
+        die "The disabled module is listed in the list of enabled modules but it should not be.";
+    }
+
+    # Reset the second module but do not perform any list checks.
+    assert_script_run("dnf module reset -y $name_alt");
+
 }
 
 1;
diff --git a/tests/modularity_install_module.pm b/tests/modularity_install_module.pm
index d674191c..9deebfb0 100644
--- a/tests/modularity_install_module.pm
+++ b/tests/modularity_install_module.pm
@@ -1,23 +1,46 @@
 use base "installedtest";
 use strict;
+use modularity;
 use testapi;
 use utils;
+
 sub run {
     my $self=shift;
     # switch to tty and login as root
     $self->root_console(tty=>3);
 
-    # Download the testing script
-    download_modularity_tests();
+    # Install a Ruby module.
+    my $name = "nodejs";
+    my $stream = "14";
+    my $profile = "default";
+    assert_script_run("dnf module install -y $name:$stream/$profile");
 
-    # Check that modularity works and that a particular module is available in the system.
-    assert_script_run('/root/test.py -m nodejs -s 12 -a list');
+    # Check that it is listed in the installed list.
+    my $enabled = script_output('dnf module list --installed');
+    my @enabled_modules = parse_module_list($enabled);
+    my $found = is_listed($name, $stream, \@enabled_modules);
+    unless ($found) {
+        die "The installed module is not listed in the list of installed modules but it should be.";
+    }
 
-    # Check that module can be enabled and removed.
-    assert_script_run('/root/test.py -m nodejs -s 12 -p default -a install,remove,reset -f hard', 120);
+    # Check that it is listed in the enabled list.
+    my $disabled = script_output('dnf module list --enabled');
+    my @disabled_modules = parse_module_list($disabled);
+    $found = is_listed($name, $stream, \@disabled_modules);
+    unless ($found) {
+        die "The installed module is not listed in the list of enabled modules but it should be.";
+    }
     
-    # Upload modular logs
-    upload_logs '/root/modular.log', failok=>1;
+    # Remove the module again.
+    assert_script_run("dnf module remove -y $name:$stream");
+
+    # Check that it is not listed in the installed list.
+    my $enabled = script_output('dnf module list --installed');
+    my @enabled_modules = parse_module_list($enabled);
+    my $found = is_listed($name, $stream, \@enabled_modules);
+    if ($found) {
+        die "The installed module is listed in the list of installed modules but it should not be.";
+    }
 }
 
 1;
diff --git a/tests/modularity_module_list.pm b/tests/modularity_module_list.pm
index 6e7f605d..4f2d170a 100644
--- a/tests/modularity_module_list.pm
+++ b/tests/modularity_module_list.pm
@@ -1,5 +1,6 @@
 use base "installedtest";
 use strict;
+use modularity;
 use testapi;
 use utils;
 
@@ -10,24 +11,39 @@ sub run {
 
     # The test case will check that dnf has modular functions and that
     # it is possible to invoke modular commands to work with modularity.
-    # It does not check the content of the further listed lists for any
-    # particular packages, modules or streams.
+
+    # Check that modular repositories are installed and enabled.
+    # If the repository does not exist, the output of the command is empty.
+    my $mfedora_output = script_output("dnf repolist --enabled fedora-modular");
+    die "The fedora-modular repo seems not to be installed." unless (length $mfedora_output);
+    my $mupdates_output = script_output("dnf repolist --enabled updates-modular");
+    die "The updates-modular repo seems not to be installed." unless (length $mupdates_output);
 
     # Check that modularity works and dnf can list the modules.
-    assert_script_run('dnf module list');
+    my $modules = script_output('dnf module list --disablerepo=updates-modular --disablerepo=updates-testing-modular', timeout => 270);
+    my @modules = parse_module_list($modules);
+    die "The module list seems to be empty when it should not be." if (scalar @modules == 0);
 
     # Check that modularity works and dnf can list the modules
     # with the -all option.
-    assert_script_run('dnf module list --all');
+    $modules = script_output('dnf module list --all --disablerepo=updates-modular --disablerepo=updates-testing-modular', timeout => 270);
+    @modules = parse_module_list($modules);
+    die "The module list seems to be empty when it should not be." if (scalar @modules == 0);
 
     # Check that dnf lists the enabled modules.
-    assert_script_run('dnf module list --enabled');
+    $modules = script_output('dnf module list --enabled', timeout => 270);
+    @modules = parse_module_list($modules);
+    die "There seem to be enabled modules when the list should be empty." unless (scalar @modules == 0);
 
     # Check that dnf lists the disabled modules.
-    assert_script_run('dnf module list --disabled');
+    $modules = script_output('dnf module list --disabled', timeout => 270);
+    @modules = parse_module_list($modules);
+    die "There seem to be disabled modules when the list should be empty." unless (scalar @modules == 0);
 
     # Check that dnf lists the installed modules.
-    assert_script_run('dnf module list --installed');
+    $modules = script_output('dnf module list --installed', timeout => 270);
+    @modules = parse_module_list($modules);
+    die "There seem to be installed modules when the list should be empty." unless (scalar @modules == 0);
 }
 
 
diff --git a/tests/modularity_update_norepo.pm b/tests/modularity_update_norepo.pm
index 0e28c5d2..d418532e 100644
--- a/tests/modularity_update_norepo.pm
+++ b/tests/modularity_update_norepo.pm
@@ -2,25 +2,29 @@ use base "installedtest";
 use strict;
 use testapi;
 use utils;
+use modularity;
+
 sub run {
     my $self=shift;
     # switch to tty and login as root
     $self->root_console(tty=>3);
 
-    # Download the testing script
-    download_modularity_tests();
-
     # Update the system
     assert_script_run('dnf update -y');
 
-    # Enable and install the nodejs module, stream 8.
-    assert_script_run('/root/test.py -m nodejs -s 11 -a enable,install -f hard');
+    # Enable and install the nodejs module, stream 11.
+    assert_script_run('dnf module install -y nodejs:15');
 
     # Update the system without modular repos.
     assert_script_run('dnf update --disablerepo=\*modular -y');
 
     # Check that the same version is listed in the installed modules.
-    assert_script_run('/root/test.py -m nodejs -s 11 -a checkinstall -f hard');
+    my $installed = script_output('dnf module list --installed');
+    my @installed_modules = parse_module_list($installed);
+    my $found = is_listed("nodejs", "15", \@installed_modules);
+    unless ($found) {
+        die "The expected module and version has not been found. The version might have been incorrectly changed by the upgrade command.";
+    }
 }
 
 1;