diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index ec2b5728..19a89f1b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -49,16 +49,14 @@ jobs:
       matrix:
         distro:
           [
-            debian_10,
             debian_11,
             debian_12,
             ubuntu_20,
             ubuntu_22,
-            ubuntu_23,
             ubuntu_24,
             centos_9,
-            fedora_39,
             fedora_40,
+            fedora_41,
           ]
     env:
       DISTRO: ${{matrix.distro}}
diff --git a/automated install/basic-install.sh b/automated install/basic-install.sh
index daa35a70..6c84369e 100755
--- a/automated install/basic-install.sh	
+++ b/automated install/basic-install.sh	
@@ -1698,7 +1698,7 @@ install_dependent_packages() {
     for i in "$@"; do
         # For each package, check if it's already installed (and if so, don't add it to the installArray)
         printf "  %b Checking for %s..." "${INFO}" "${i}"
-        if "${PKG_MANAGER}" -q list installed "${i}" &> /dev/null; then
+        if rpm -q "${i}" &> /dev/null; then
             printf "%b  %b Checking for %s\\n" "${OVER}" "${TICK}" "${i}"
         else
             printf "%b  %b Checking for %s (will be installed)\\n" "${OVER}" "${INFO}" "${i}"
diff --git a/test/_debian_10.Dockerfile b/test/_debian_10.Dockerfile
deleted file mode 100644
index 3b177cc8..00000000
--- a/test/_debian_10.Dockerfile
+++ /dev/null
@@ -1,17 +0,0 @@
-FROM buildpack-deps:buster-scm
-
-ENV GITDIR /etc/.pihole
-ENV SCRIPTDIR /opt/pihole
-
-RUN mkdir -p $GITDIR $SCRIPTDIR /etc/pihole
-ADD . $GITDIR
-RUN cp $GITDIR/advanced/Scripts/*.sh $GITDIR/gravity.sh $GITDIR/pihole $GITDIR/automated\ install/*.sh $SCRIPTDIR/
-ENV PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:$SCRIPTDIR
-
-RUN true && \
-    chmod +x $SCRIPTDIR/*
-
-ENV SKIP_INSTALL true
-ENV OS_CHECK_DOMAIN_NAME dev-supportedos.pi-hole.net
-
-#sed '/# Start the installer/Q' /opt/pihole/basic-install.sh > /opt/pihole/stub_basic-install.sh && \
diff --git a/test/_fedora_39.Dockerfile b/test/_fedora_41.Dockerfile
similarity index 97%
rename from test/_fedora_39.Dockerfile
rename to test/_fedora_41.Dockerfile
index 1727a3aa..5297e2a8 100644
--- a/test/_fedora_39.Dockerfile
+++ b/test/_fedora_41.Dockerfile
@@ -1,4 +1,4 @@
-FROM fedora:39
+FROM fedora:41
 RUN dnf install -y git initscripts
 
 ENV GITDIR /etc/.pihole
diff --git a/test/_ubuntu_23.Dockerfile b/test/_ubuntu_23.Dockerfile
deleted file mode 100644
index f9b3910b..00000000
--- a/test/_ubuntu_23.Dockerfile
+++ /dev/null
@@ -1,18 +0,0 @@
-FROM buildpack-deps:lunar-scm
-
-ENV GITDIR /etc/.pihole
-ENV SCRIPTDIR /opt/pihole
-
-RUN mkdir -p $GITDIR $SCRIPTDIR /etc/pihole
-ADD . $GITDIR
-RUN cp $GITDIR/advanced/Scripts/*.sh $GITDIR/gravity.sh $GITDIR/pihole $GITDIR/automated\ install/*.sh $SCRIPTDIR/
-ENV PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:$SCRIPTDIR
-ENV DEBIAN_FRONTEND=noninteractive
-
-RUN true && \
-    chmod +x $SCRIPTDIR/*
-
-ENV SKIP_INSTALL true
-ENV OS_CHECK_DOMAIN_NAME dev-supportedos.pi-hole.net
-
-#sed '/# Start the installer/Q' /opt/pihole/basic-install.sh > /opt/pihole/stub_basic-install.sh && \
diff --git a/test/test_any_automated_install.py b/test/test_any_automated_install.py
index c1b91664..a5038d3c 100644
--- a/test/test_any_automated_install.py
+++ b/test/test_any_automated_install.py
@@ -179,7 +179,7 @@ def test_installPihole_fresh_install_readableFiles(host):
     # Install FTL's development branch to get the latest features
     host.run(
         """
-    echo "development" > /etc/pihole/ftlbranch
+    echo "master" > /etc/pihole/ftlbranch
     """
     )
     install = host.run(
@@ -440,7 +440,7 @@ def test_installPihole_fresh_install_readableBlockpage(host, test_webpage):
     # Install FTL's development branch to get the latest features
     host.run(
         """
-    echo "development" > /etc/pihole/ftlbranch
+    echo "master" > /etc/pihole/ftlbranch
     """
     )
     installWeb = host.run(
@@ -893,7 +893,7 @@ def test_FTL_binary_installed_and_responsive_no_errors(host):
     source /opt/pihole/basic-install.sh
     create_pihole_user
     funcOutput=$(get_binary_name)
-    echo "development" > /etc/pihole/ftlbranch
+    echo "master" > /etc/pihole/ftlbranch
     binary="pihole-FTL${funcOutput##*pihole-FTL}"
     theRest="${funcOutput%pihole-FTL*}"
     FTLdetect "${binary}" "${theRest}"
diff --git a/test/tox.debian_10.ini b/test/tox.debian_10.ini
deleted file mode 100644
index f107300f..00000000
--- a/test/tox.debian_10.ini
+++ /dev/null
@@ -1,8 +0,0 @@
-[tox]
-envlist = py3
-
-[testenv:py3]
-allowlist_externals = docker
-deps = -rrequirements.txt
-commands = docker buildx build --load --progress plain -f _debian_10.Dockerfile -t pytest_pihole:test_container ../
-           pytest {posargs:-vv -n auto} ./test_any_automated_install.py ./test_any_utils.py
diff --git a/test/tox.fedora_39.ini b/test/tox.fedora_41.ini
similarity index 85%
rename from test/tox.fedora_39.ini
rename to test/tox.fedora_41.ini
index 7a538371..2b95a670 100644
--- a/test/tox.fedora_39.ini
+++ b/test/tox.fedora_41.ini
@@ -4,5 +4,5 @@ envlist = py3
 [testenv]
 allowlist_externals = docker
 deps = -rrequirements.txt
-commands = docker buildx build --load --progress plain -f _fedora_39.Dockerfile -t pytest_pihole:test_container ../
+commands = docker buildx build --load --progress plain -f _fedora_41.Dockerfile -t pytest_pihole:test_container ../
            pytest {posargs:-vv -n auto} ./test_any_automated_install.py ./test_any_utils.py ./test_centos_fedora_common_support.py ./test_fedora_support.py
diff --git a/test/tox.ubuntu_23.ini b/test/tox.ubuntu_23.ini
deleted file mode 100644
index 767ed9ef..00000000
--- a/test/tox.ubuntu_23.ini
+++ /dev/null
@@ -1,8 +0,0 @@
-[tox]
-envlist = py3
-
-[testenv:py3]
-allowlist_externals = docker
-deps = -rrequirements.txt
-commands = docker buildx build --load --progress plain -f _ubuntu_23.Dockerfile -t pytest_pihole:test_container ../
-           pytest {posargs:-vv -n auto} ./test_any_automated_install.py ./test_any_utils.py