diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 5d73f31b..ac496406 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -72,6 +72,7 @@ jobs:
             centos_10,
             fedora_40,
             fedora_41,
+            fedora_42,
           ]
     env:
       DISTRO: ${{matrix.distro}}
@@ -80,7 +81,7 @@ jobs:
         uses: actions/checkout@v4.2.2
 
       - name: Set up Python 3.10
-        uses: actions/setup-python@v5.5.0
+        uses: actions/setup-python@v5.6.0
         with:
           python-version: "3.10"
 
diff --git a/README.md b/README.md
index f320f8c5..622ff202 100644
--- a/README.md
+++ b/README.md
@@ -128,7 +128,10 @@ Some of the statistics you can integrate include:
 - Queries cached
 - Unique clients
 
-Access the API via [`telnet`](https://github.com/pi-hole/FTL), the Web (`admin/api.php`) and Command Line (`pihole -c -j`). You can find out [more details over here](https://discourse.pi-hole.net/t/pi-hole-api/1863).
+Access the API using:
+- your browser: http://pi.hole/api/docs
+- `curl`: `curl --connect-timeout 2 -ks "https://pi.hole/api/stats/summary" -H "Accept: application/json"`;
+- the command line - examples: `pihole api config/webserver/port` or `pihole api stats/summary`.
 
 ### The Command-Line Interface
 
diff --git a/advanced/Scripts/piholeDebug.sh b/advanced/Scripts/piholeDebug.sh
index 70c0ffe2..741ff2f4 100755
--- a/advanced/Scripts/piholeDebug.sh
+++ b/advanced/Scripts/piholeDebug.sh
@@ -296,91 +296,12 @@ check_component_versions() {
     check_ftl_version
 }
 
-os_check() {
-    # This function gets a list of supported OS versions from a TXT record at versions.pi-hole.net
-    # and determines whether or not the script is running on one of those systems
-    local remote_os_domain valid_os valid_version detected_os detected_version cmdResult digReturnCode response
-    remote_os_domain=${OS_CHECK_DOMAIN_NAME:-"versions.pi-hole.net"}
-
-    detected_os=$(grep "\bID\b" /etc/os-release | cut -d '=' -f2 | tr -d '"')
-    detected_version=$(grep VERSION_ID /etc/os-release | cut -d '=' -f2 | tr -d '"')
-
-    cmdResult="$(dig -4 +short -t txt "${remote_os_domain}" @ns1.pi-hole.net 2>&1; echo $?)"
-    #Get the return code of the previous command (last line)
-    digReturnCode="${cmdResult##*$'\n'}"
-
-    # Extract dig response
-    response="${cmdResult%%$'\n'*}"
-
-    if [ "${digReturnCode}" -ne 0 ]; then
-        log_write "${INFO} Distro: ${detected_os^}"
-        log_write "${INFO} Version: ${detected_version}"
-        log_write "${CROSS} dig IPv4 return code: ${COL_RED}${digReturnCode}${COL_NC}"
-        log_write "${CROSS} dig response: ${response}"
-        log_write "${INFO} Retrying via IPv6"
-
-        cmdResult="$(dig -6 +short -t txt "${remote_os_domain}" @ns1.pi-hole.net 2>&1; echo $?)"
-        #Get the return code of the previous command (last line)
-        digReturnCode="${cmdResult##*$'\n'}"
-
-        # Extract dig response
-        response="${cmdResult%%$'\n'*}"
-    fi
-    # If also no success via IPv6
-    if [ "${digReturnCode}" -ne 0 ]; then
-        log_write "${CROSS} dig IPv6 return code: ${COL_RED}${digReturnCode}${COL_NC}"
-        log_write "${CROSS} dig response: ${response}"
-        log_write "${CROSS} Error: ${COL_RED}dig command failed - Unable to check OS${COL_NC}"
-    else
-        IFS=" " read -r -a supportedOS < <(echo "${response}" | tr -d '"')
-        for distro_and_versions in "${supportedOS[@]}"
-        do
-            distro_part="${distro_and_versions%%=*}"
-            versions_part="${distro_and_versions##*=}"
-
-            if [[ "${detected_os^^}" =~ ${distro_part^^} ]]; then
-                valid_os=true
-                IFS="," read -r -a supportedVer <<<"${versions_part}"
-                for version in "${supportedVer[@]}"
-                do
-                    if [[ "${detected_version}" =~ $version ]]; then
-                        valid_version=true
-                        break
-                    fi
-                done
-                break
-            fi
-        done
-
-        # If it is a docker container, we can assume the OS is supported
-        [ -n "${DOCKER_VERSION}" ] && valid_os=true && valid_version=true
-
-        local finalmsg
-        if [ "$valid_os" = true ]; then
-            log_write "${TICK} Distro:  ${COL_GREEN}${detected_os^}${COL_NC}"
-
-            if [ "$valid_version" = true ]; then
-                log_write "${TICK} Version: ${COL_GREEN}${detected_version}${COL_NC}"
-                finalmsg="${TICK} ${COL_GREEN}Distro and version supported${COL_NC}"
-            else
-                log_write "${CROSS} Version: ${COL_RED}${detected_version}${COL_NC}"
-                finalmsg="${CROSS} Error: ${COL_RED}${detected_os^} is supported but version ${detected_version} is currently unsupported ${COL_NC}(${FAQ_HARDWARE_REQUIREMENTS})${COL_NC}"
-            fi
-        else
-            log_write "${CROSS} Distro:  ${COL_RED}${detected_os^}${COL_NC}"
-            finalmsg="${CROSS} Error: ${COL_RED}${detected_os^} is not a supported distro ${COL_NC}(${FAQ_HARDWARE_REQUIREMENTS})${COL_NC}"
-        fi
-
-        # Print dig response and the final check result
-        log_write "${TICK} dig return code: ${COL_GREEN}${digReturnCode}${COL_NC}"
-        log_write "${INFO} dig response: ${response}"
-        log_write "${finalmsg}"
-    fi
-}
-
 diagnose_operating_system() {
     # error message in a variable so we can easily modify it later (or reuse it)
     local error_msg="Distribution unknown -- most likely you are on an unsupported platform and may run into issues."
+    local detected_os
+    local detected_version
+
     # Display the current test that is running
     echo_current_diagnostic "Operating system"
 
@@ -389,8 +310,13 @@ diagnose_operating_system() {
 
     # If there is a /etc/*release file, it's probably a supported operating system, so we can
     if ls /etc/*release 1> /dev/null 2>&1; then
-        # display the attributes to the user from the function made earlier
-        os_check
+        # display the attributes to the user
+
+        detected_os=$(grep "\bID\b" /etc/os-release | cut -d '=' -f2 | tr -d '"')
+        detected_version=$(grep VERSION_ID /etc/os-release | cut -d '=' -f2 | tr -d '"')
+
+        log_write "${INFO} Distro: ${detected_os^}"
+        log_write "${INFO} Version: ${detected_version}"
     else
         # If it doesn't exist, it's not a system we currently support and link to FAQ
         log_write "${CROSS} ${COL_RED}${error_msg}${COL_NC} (${FAQ_HARDWARE_REQUIREMENTS})"
diff --git a/advanced/Scripts/update.sh b/advanced/Scripts/update.sh
index 08a50be1..51c1b1a1 100755
--- a/advanced/Scripts/update.sh
+++ b/advanced/Scripts/update.sh
@@ -112,8 +112,6 @@ main() {
     web_update=false
     FTL_update=false
 
-    # Perform an OS check to ensure we're on an appropriate operating system
-    os_check
 
     # Install packages used by this installation script (necessary if users have removed e.g. git from their systems)
     package_manager_detect
diff --git a/automated install/basic-install.sh b/automated install/basic-install.sh
index af03d93d..fda294b4 100755
--- a/automated install/basic-install.sh	
+++ b/automated install/basic-install.sh	
@@ -227,176 +227,6 @@ is_command() {
     command -v "${check_command}" >/dev/null 2>&1
 }
 
-os_check_dig(){
-    local protocol="$1"
-    local domain="$2"
-    local nameserver="$3"
-    local response
-
-    response="$(dig -"${protocol}" +short -t txt "${domain}" "${nameserver}" 2>&1
-    echo $?
-    )"
-    echo "${response}"
-}
-
-os_check_dig_response(){
-    # Checks the reply from the dig command to determine if it's a valid response
-    local digReply="$1"
-    local response
-
-    # Dig returned 0 (success), so get the actual response, and loop through it to determine if the detected variables above are valid
-    response="${digReply%%$'\n'*}"
-    # If the value of ${response} is a single 0, then this is the return code, not an actual response.
-    if [ "${response}" == 0 ]; then
-        echo false
-    else
-        echo true
-    fi
-}
-
-os_check() {
-    if [ "$PIHOLE_SKIP_OS_CHECK" != true ]; then
-        # This function gets a list of supported OS versions from a TXT record at versions.pi-hole.net
-        # and determines whether or not the script is running on one of those systems
-        local remote_os_domain valid_os valid_version valid_response detected_os detected_version display_warning cmdResult digReturnCode response
-        local piholeNameserver="@ns1.pi-hole.net"
-        remote_os_domain=${OS_CHECK_DOMAIN_NAME:-"versions.pi-hole.net"}
-
-        detected_os=$(grep '^ID=' /etc/os-release | cut -d '=' -f2 | tr -d '"')
-        detected_version=$(grep VERSION_ID /etc/os-release | cut -d '=' -f2 | tr -d '"')
-
-        # Test via IPv4 and hardcoded nameserver ns1.pi-hole.net
-        cmdResult=$(os_check_dig 4 "${remote_os_domain}" "${piholeNameserver}")
-
-        # Gets the return code of the previous command (last line)
-        digReturnCode="${cmdResult##*$'\n'}"
-
-        if [ ! "${digReturnCode}" == "0" ]; then
-            valid_response=false
-        else
-            valid_response=$(os_check_dig_response cmdResult)
-        fi
-
-        # Try again via IPv6 and hardcoded nameserver ns1.pi-hole.net
-        if [ "$valid_response" = false ]; then
-            unset valid_response
-            unset cmdResult
-            unset digReturnCode
-
-            cmdResult=$(os_check_dig 6 "${remote_os_domain}" "${piholeNameserver}")
-            # Gets the return code of the previous command (last line)
-            digReturnCode="${cmdResult##*$'\n'}"
-
-            if [ ! "${digReturnCode}" == "0" ]; then
-                valid_response=false
-            else
-                valid_response=$(os_check_dig_response cmdResult)
-            fi
-        fi
-
-        # Try again without hardcoded nameserver
-        if [ "$valid_response" = false ]; then
-            unset valid_response
-            unset cmdResult
-            unset digReturnCode
-
-            cmdResult=$(os_check_dig 4 "${remote_os_domain}")
-            # Gets the return code of the previous command (last line)
-            digReturnCode="${cmdResult##*$'\n'}"
-
-            if [ ! "${digReturnCode}" == "0" ]; then
-                valid_response=false
-            else
-                valid_response=$(os_check_dig_response cmdResult)
-            fi
-        fi
-
-        if [ "$valid_response" = false ]; then
-            unset valid_response
-            unset cmdResult
-            unset digReturnCode
-
-            cmdResult=$(os_check_dig 6 "${remote_os_domain}")
-            # Gets the return code of the previous command (last line)
-            digReturnCode="${cmdResult##*$'\n'}"
-
-            if [ ! "${digReturnCode}" == "0" ]; then
-                valid_response=false
-            else
-                valid_response=$(os_check_dig_response cmdResult)
-            fi
-        fi
-
-        if [ "$valid_response" = true ]; then
-            response="${cmdResult%%$'\n'*}"
-            IFS=" " read -r -a supportedOS < <(echo "${response}" | tr -d '"')
-            for distro_and_versions in "${supportedOS[@]}"; do
-                distro_part="${distro_and_versions%%=*}"
-                versions_part="${distro_and_versions##*=}"
-
-                # If the distro part is a (case-insensitive) substring of the computer OS
-                if [[ "${detected_os^^}" =~ ${distro_part^^} ]]; then
-                    valid_os=true
-                    IFS="," read -r -a supportedVer <<<"${versions_part}"
-                    for version in "${supportedVer[@]}"; do
-                        if [[ "${detected_version}" =~ $version ]]; then
-                            valid_version=true
-                            break
-                        fi
-                    done
-                    break
-                fi
-            done
-        fi
-
-        if [ "$valid_os" = true ] && [ "$valid_version" = true ] && [ "$valid_response" = true ]; then
-            display_warning=false
-        fi
-
-        if [ "$display_warning" != false ]; then
-            if [ "$valid_response" = false ]; then
-
-                if [ "${digReturnCode}" -eq 0 ]; then
-                    errStr="dig succeeded, but response was blank. Please contact support"
-                else
-                    errStr="dig failed with return code ${digReturnCode}"
-                fi
-                printf "  %b %bRetrieval of supported OS list failed. %s. %b\\n" "${CROSS}" "${COL_LIGHT_RED}" "${errStr}" "${COL_NC}"
-                printf "      %bUnable to determine if the detected OS (%s %s) is supported%b\\n" "${COL_LIGHT_RED}" "${detected_os^}" "${detected_version}" "${COL_NC}"
-                printf "      Possible causes for this include:\\n"
-                printf "        - Firewall blocking DNS lookups from Pi-hole device to ns1.pi-hole.net\\n"
-                printf "        - DNS resolution issues of the host system\\n"
-                printf "        - Other internet connectivity issues\\n"
-            else
-                printf "  %b %bUnsupported OS detected: %s %s%b\\n" "${CROSS}" "${COL_LIGHT_RED}" "${detected_os^}" "${detected_version}" "${COL_NC}"
-                printf "      If you are seeing this message and you do have a supported OS, please contact support.\\n"
-            fi
-            printf "\\n"
-            printf "      %bhttps://docs.pi-hole.net/main/prerequisites/#supported-operating-systems%b\\n" "${COL_LIGHT_GREEN}" "${COL_NC}"
-            printf "\\n"
-            printf "      If you wish to attempt to continue anyway, you can try one of the following commands to skip this check:\\n"
-            printf "\\n"
-            printf "      e.g: If you are seeing this message on a fresh install, you can run:\\n"
-            printf "             %bcurl -sSL https://install.pi-hole.net | sudo PIHOLE_SKIP_OS_CHECK=true bash%b\\n" "${COL_LIGHT_GREEN}" "${COL_NC}"
-            printf "\\n"
-            printf "           If you are seeing this message after having run pihole -up:\\n"
-            printf "             %bsudo PIHOLE_SKIP_OS_CHECK=true pihole -r%b\\n" "${COL_LIGHT_GREEN}" "${COL_NC}"
-            printf "           (In this case, your previous run of pihole -up will have already updated the local repository)\\n"
-            printf "\\n"
-            printf "      It is possible that the installation will still fail at this stage due to an unsupported configuration.\\n"
-            printf "      If that is the case, you can feel free to ask the community on Discourse with the %bCommunity Help%b category:\\n" "${COL_LIGHT_RED}" "${COL_NC}"
-            printf "      %bhttps://discourse.pi-hole.net/c/bugs-problems-issues/community-help/%b\\n" "${COL_LIGHT_GREEN}" "${COL_NC}"
-            printf "\\n"
-            exit 1
-
-        else
-            printf "  %b %bSupported OS detected%b\\n" "${TICK}" "${COL_LIGHT_GREEN}" "${COL_NC}"
-        fi
-    else
-        printf "  %b %bPIHOLE_SKIP_OS_CHECK env variable set to true - installer will continue%b\\n" "${INFO}" "${COL_LIGHT_GREEN}" "${COL_NC}"
-    fi
-}
-
 # Compatibility
 package_manager_detect() {
 
@@ -2369,8 +2199,6 @@ main() {
     # Install Pi-hole dependencies
     install_dependent_packages
 
-    # Check that the installed OS is officially supported - display warning if not
-    os_check
 
     # Check if there is a usable FTL binary available on this architecture - do
     # this early on as FTL is a hard dependency for Pi-hole
diff --git a/gravity.sh b/gravity.sh
index 19458c16..008be82c 100755
--- a/gravity.sh
+++ b/gravity.sh
@@ -348,17 +348,24 @@ gravity_CheckDNSResolutionAvailable() {
     echo -e "  ${CROSS} DNS resolution is currently unavailable"
   fi
 
-  str="Waiting until DNS resolution is available..."
+  str="Waiting up to 120 seconds for DNS resolution..."
   echo -ne "  ${INFO} ${str}"
-  until getent hosts github.com &> /dev/null; do
-  # Append one dot for each second waiting
-    str="${str}."
-    echo -ne "  ${OVER}  ${INFO} ${str}"
-    sleep 1
+
+ # Default DNS timeout is two seconds, plus 1 second for each dot > 120 seconds
+  for ((i = 0; i < 40; i++)); do
+      if getent hosts github.com &> /dev/null; then
+        # If we reach this point, DNS resolution is available
+        echo -e "${OVER}  ${TICK} DNS resolution is available"
+        break
+      fi
+      # Append one dot for each second waiting
+      echo -ne "."
+      sleep 1
   done
 
-  # If we reach this point, DNS resolution is available
-  echo -e "${OVER}  ${TICK} DNS resolution is available"
+  # DNS resolution is still unavailable after 120 seconds
+  return 1
+
 }
 
 # Function: try_restore_backup
@@ -417,7 +424,7 @@ gravity_DownloadBlocklists() {
     echo -e "  ${INFO} Storing gravity database in ${COL_BOLD}${gravityDBfile}${COL_NC}"
   fi
 
-  local url domain str target compression adlist_type directory success
+  local url domain str compression adlist_type directory success
   echo ""
 
   # Prepare new gravity database
@@ -566,7 +573,7 @@ gravity_DownloadBlocklists() {
     if [[ "${check_url}" =~ ${regex} ]]; then
       echo -e "  ${CROSS} Invalid Target"
     else
-      timeit gravity_DownloadBlocklistFromUrl "${url}" "${sourceIDs[$i]}" "${saveLocation}" "${target}" "${compression}" "${adlist_type}" "${domain}"
+      timeit gravity_DownloadBlocklistFromUrl "${url}" "${sourceIDs[$i]}" "${saveLocation}" "${compression}" "${adlist_type}" "${domain}"
     fi
     echo ""
   done
@@ -600,7 +607,7 @@ compareLists() {
 
 # Download specified URL and perform checks on HTTP status and file content
 gravity_DownloadBlocklistFromUrl() {
-  local url="${1}" adlistID="${2}" saveLocation="${3}" target="${4}" compression="${5}" gravity_type="${6}" domain="${7}"
+  local url="${1}" adlistID="${2}" saveLocation="${3}" compression="${4}" gravity_type="${5}" domain="${6}"
   local listCurlBuffer str httpCode success="" ip customUpstreamResolver=""
   local file_path permissions ip_addr port blocked=false download=true
   # modifiedOptions is an array to store all the options used to check if the adlist has been changed upstream
@@ -1081,6 +1088,12 @@ for var in "$@"; do
   esac
 done
 
+# Check if DNS is available, no need to do any database manipulation if we're not able to download adlists
+if ! timeit gravity_CheckDNSResolutionAvailable; then
+  echo -e "   ${CROSS} No DNS resolution available. Please contact support."
+  exit 1
+fi
+
 # Remove OLD (backup) gravity file, if it exists
 if [[ -f "${gravityOLDfile}" ]]; then
   rm "${gravityOLDfile}"
@@ -1121,11 +1134,6 @@ if [[ "${forceDelete:-}" == true ]]; then
 fi
 
 # Gravity downloads blocklists next
-if ! timeit gravity_CheckDNSResolutionAvailable; then
-  echo -e "   ${CROSS} Can not complete gravity update, no DNS is available. Please contact support."
-  exit 1
-fi
-
 if ! gravity_DownloadBlocklists; then
   echo -e "   ${CROSS} Unable to create gravity database. Please try again later. If the problem persists, please contact support."
   exit 1
diff --git a/test/_centos_10.Dockerfile b/test/_centos_10.Dockerfile
index ca439e1b..78a89789 100644
--- a/test/_centos_10.Dockerfile
+++ b/test/_centos_10.Dockerfile
@@ -15,6 +15,5 @@ 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/_centos_9.Dockerfile b/test/_centos_9.Dockerfile
index a5e7cf0b..73f53fa5 100644
--- a/test/_centos_9.Dockerfile
+++ b/test/_centos_9.Dockerfile
@@ -15,6 +15,5 @@ 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/_debian_11.Dockerfile b/test/_debian_11.Dockerfile
index b8107244..2389063c 100644
--- a/test/_debian_11.Dockerfile
+++ b/test/_debian_11.Dockerfile
@@ -12,6 +12,5 @@ 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/_debian_12.Dockerfile b/test/_debian_12.Dockerfile
index 7446711a..a6c5f1ed 100644
--- a/test/_debian_12.Dockerfile
+++ b/test/_debian_12.Dockerfile
@@ -12,6 +12,5 @@ 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_40.Dockerfile b/test/_fedora_40.Dockerfile
index 20102a10..43913895 100644
--- a/test/_fedora_40.Dockerfile
+++ b/test/_fedora_40.Dockerfile
@@ -13,6 +13,5 @@ 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_41.Dockerfile b/test/_fedora_41.Dockerfile
index bf5fe5d5..c03371a5 100644
--- a/test/_fedora_41.Dockerfile
+++ b/test/_fedora_41.Dockerfile
@@ -13,6 +13,5 @@ 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_42.Dockerfile b/test/_fedora_42.Dockerfile
new file mode 100644
index 00000000..90b17c0b
--- /dev/null
+++ b/test/_fedora_42.Dockerfile
@@ -0,0 +1,17 @@
+FROM fedora:42
+RUN dnf install -y git initscripts
+
+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 $GITDIR/advanced/Scripts/COL_TABLE $SCRIPTDIR/
+ENV PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:$SCRIPTDIR
+
+RUN true && \
+    chmod +x $SCRIPTDIR/*
+
+ENV SKIP_INSTALL=true
+
+#sed '/# Start the installer/Q' /opt/pihole/basic-install.sh > /opt/pihole/stub_basic-install.sh && \
diff --git a/test/_ubuntu_20.Dockerfile b/test/_ubuntu_20.Dockerfile
index 75c12673..5b8deb5d 100644
--- a/test/_ubuntu_20.Dockerfile
+++ b/test/_ubuntu_20.Dockerfile
@@ -12,6 +12,5 @@ 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/_ubuntu_22.Dockerfile b/test/_ubuntu_22.Dockerfile
index 9206a46a..c3be89e1 100644
--- a/test/_ubuntu_22.Dockerfile
+++ b/test/_ubuntu_22.Dockerfile
@@ -13,6 +13,5 @@ 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/_ubuntu_24.Dockerfile b/test/_ubuntu_24.Dockerfile
index 4cab43de..cf57c2aa 100644
--- a/test/_ubuntu_24.Dockerfile
+++ b/test/_ubuntu_24.Dockerfile
@@ -13,6 +13,5 @@ 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 5fa0f065..0fa0453a 100644
--- a/test/test_any_automated_install.py
+++ b/test/test_any_automated_install.py
@@ -245,6 +245,7 @@ def test_FTL_detect_no_errors(host, arch, detected_string, supported):
         {
             "-A /bin/sh": ("Tag_CPU_arch: " + arch, "0"),
             "-A /usr/bin/sh": ("Tag_CPU_arch: " + arch, "0"),
+            "-A /usr/sbin/sh": ("Tag_CPU_arch: " + arch, "0"),
         },
         host,
     )
@@ -465,50 +466,6 @@ def test_validate_ip(host):
     test_address("0.0.0.0#00001", False)
 
 
-def test_os_check_fails(host):
-    """Confirms install fails on unsupported OS"""
-    host.run(
-        """
-    source /opt/pihole/basic-install.sh
-    package_manager_detect
-    build_dependency_package
-    install_dependent_packages
-    cat <<EOT > /etc/os-release
-ID=UnsupportedOS
-VERSION_ID="2"
-EOT
-    """
-    )
-    detectOS = host.run(
-        """t
-    source /opt/pihole/basic-install.sh
-    os_check
-    """
-    )
-    expected_stdout = "Unsupported OS detected: UnsupportedOS"
-    assert expected_stdout in detectOS.stdout
-
-
-def test_os_check_passes(host):
-    """Confirms OS meets the requirements"""
-    host.run(
-        """
-    source /opt/pihole/basic-install.sh
-    package_manager_detect
-    build_dependency_package
-    install_dependent_packages
-    """
-    )
-    detectOS = host.run(
-        """
-    source /opt/pihole/basic-install.sh
-    os_check
-    """
-    )
-    expected_stdout = "Supported OS detected"
-    assert expected_stdout in detectOS.stdout
-
-
 def test_package_manager_has_pihole_deps(host):
     """Confirms OS is able to install the required packages for Pi-hole"""
     mock_command("dialog", {"*": ("", "0")}, host)
diff --git a/test/tox.fedora_42.ini b/test/tox.fedora_42.ini
new file mode 100644
index 00000000..67eb77e4
--- /dev/null
+++ b/test/tox.fedora_42.ini
@@ -0,0 +1,10 @@
+[tox]
+envlist = py3
+
+[testenv]
+allowlist_externals = docker
+deps = -rrequirements.txt
+setenv =
+    COLUMNS=120
+commands = docker buildx build --load --progress plain -f _fedora_42.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