diff --git a/bin/postgresql-setup.in b/bin/postgresql-setup.in
index 9626dd9..1b8bcfa 100644
--- a/bin/postgresql-setup.in
+++ b/bin/postgresql-setup.in
@@ -59,6 +59,16 @@ option_upgradefrom="@NAME_DEFAULT_PREV_SERVICE@"
 srvsuff=
 test 0 -eq @WANT_SYSVINIT@ && srvsuff=".service"
 
+if [ @PGMAJORVERSION@ -ge 18 ]; then
+    checksums_default_line="
+                             Default behavior when initializing (not upgrading).
+                             To upgrade to PostgreSQL @PGMAJORVERSION@ without
+                             enabling data checksums, add --no-data-checksums
+                             to PGSETUP_INITDB_OPTIONS (will override this flag)
+                             If data checksums are already enabled, there is no
+                             need to specify this flag."
+fi
+
 USAGE_STRING=$"\
 Usage: $0 MODE_OPTION [--unit=UNIT_NAME] [OPTION...]
 
@@ -97,6 +107,9 @@ Options:
   --upgrade-from=ID          Specify id \"old\" postgresql stack to upgrade
                              from.  List of available IDs can be listed by
                              --upgrade-ids.  Default is '$option_upgradefrom'.
+  --data-checksums           Enable data checksums for the data directory.
+                             If upgrading, they will be enabled before
+                             performing the upgrade.${checksums_default_line}
 
 Other options:
   --help                     show this help
@@ -161,6 +174,15 @@ perform_initdb()
     $RESTORECON "$initdb_log"
     test -w "$initdb_log" || echo "$initdb_log is not writeable by $USER"
 
+    # add option to enable data checksums if flag provided
+    if [ "${option_data_checksums:-0}" -eq 1 ] && [ @PGMAJORVERSION@ -lt 18 ]; then
+            if [ -n "$PGSETUP_INITDB_OPTIONS" ]; then
+                export PGSETUP_INITDB_OPTIONS="$PGSETUP_INITDB_OPTIONS --data-checksums"
+            else
+                export PGSETUP_INITDB_OPTIONS="--data-checksums"
+            fi
+    fi
+
     # Initialize the database
     initdbcmd+=( "$PGENGINE"/initdb --pgdata="$pgdata" --auth=ident )
     eval "initdbcmd+=( $PGSETUP_INITDB_OPTIONS )"
@@ -213,6 +235,30 @@ old_data_in_use()
 }
 
 
+enable_checksums()
+{
+    local old_datadir="$1"
+    local old_bindir="$2"
+
+    if [ "${option_data_checksums:-0}" -eq 1 ] \
+    && ! echo "$PGSETUP_INITDB_OPTIONS" | grep -qE -- "--no-data-checksums"; then
+        debug "enabling data checksums"
+        local enable_checksums_result
+        enable_checksums_result=$("$old_bindir"/pg_checksums -e "$old_datadir" 2>&1)
+        local enable_checksums_code=$?
+        if [ ! $enable_checksums_code ]; then
+            error "Could not enable checksums!"
+            error_q $"$enable_checksums_result"
+            return 1
+        fi
+    elif [ "${option_data_checksums:-0}" -eq 1 ]; then
+        warn "Both --data-checksums and --no-data-checksums flags specified,"
+        warn_q "upgrading without enabling data checksums!"
+        option_data_checksums=0
+    fi
+}
+
+
 upgrade()
 {
     local inplace=false
@@ -243,6 +289,32 @@ upgrade()
         exit 5
     fi
 
+    info "Checking data checksums"
+    # timeout for large databases, if checksums are disabled, this command will fail fast
+    checksums_result=$(timeout 1 "$upgradefrom_engine"/pg_checksums "$upgradefrom_data" 2>&1)
+    checksums_code=$?
+    # if timed out, the exit code is 124
+    if [ $checksums_code -ne 0 ] && [ $checksums_code -ne 124 ]; then
+        if echo "$checksums_result" | grep -q "not enabled"; then
+            if [ "${option_data_checksums:-0}" -ne 1 ] \
+            && ! echo "$PGSETUP_INITDB_OPTIONS" | grep -qE -- "--no-data-checksums" \
+            && [ @PGMAJORVERSION@ -ge 18 ]; then
+                error "PostgreSQL @PGMAJORVERSION@ has data checksums enabled by default,"
+                error_q "while your current data directory does not. Please either use the"
+                error_q "--data-checksums flag to enable them before upgrading, or add"
+                error_q "--no-data-checksums to the PGSETUP_INITDB_OPTIONS environment variable."
+                exit 1
+            else
+                debug "checksums flags provided"
+            fi
+        else
+            # this means that checksums are enabled but something else failed
+            error "Checksum check failed! Output from pg_checksums:"
+            error_q $"$checksums_result"
+            exit 1
+        fi
+    fi
+
     # Set up log file for pg_upgrade
     rm -f "$upgrade_log"
     touch "$upgrade_log" || die "can't write into $upgrade_log file"
@@ -275,6 +347,8 @@ upgrade()
 
     info $"Upgrading database."
 
+    enable_checksums "$pgdataold" "$upgradefrom_engine"
+
     scls_upgrade_hacks=
     test -n "$upgradefrom_scls" && {
         debug "scls [$upgradefrom_scls] will be enabled"
@@ -642,7 +716,7 @@ long_opts="\
 initdb,upgrade,\
 new-systemd-unit,upgrade-ids,\
 unit:,service:,port:,datadir:,upgrade-from:,upgrade-from-unit:,\
-debug,\
+data-checksums,debug,\
 version,help,usage"
 
 args=`getopt -o "$short_opts" -l "$long_opts" -n "@NAME_BINARYBASE@-setup" -- "$@"` \
@@ -701,6 +775,11 @@ while true; do
             exit 0
             ;;
 
+        --data-checksums)
+            option_data_checksums=1
+            shift
+            ;;
+
         --version)
             print_version
             exit 0
diff --git a/tmt/plans/fedora-checksums.fmf b/tmt/plans/fedora-checksums.fmf
new file mode 100644
index 0000000..5659893
--- /dev/null
+++ b/tmt/plans/fedora-checksums.fmf
@@ -0,0 +1,8 @@
+name: /plans/fedora
+summary: Run tests in a fedora virtual machine environment
+discover:
+  how: fmf
+  directory: tests/
+  filter: tag:fedora-checksums
+execute:
+  how: tmt
diff --git a/tmt/tests/virtual/checksums/disable-and-enable/main.fmf b/tmt/tests/virtual/checksums/disable-and-enable/main.fmf
new file mode 100644
index 0000000..06bee88
--- /dev/null
+++ b/tmt/tests/virtual/checksums/disable-and-enable/main.fmf
@@ -0,0 +1,2 @@
+summary: Check if upgrading to postgres 18 with contradictory flags works
+name: checksums-disable-and-enable
diff --git a/tmt/tests/virtual/checksums/disable-and-enable/test.sh b/tmt/tests/virtual/checksums/disable-and-enable/test.sh
new file mode 100755
index 0000000..ff5db59
--- /dev/null
+++ b/tmt/tests/virtual/checksums/disable-and-enable/test.sh
@@ -0,0 +1,69 @@
+#!/bin/bash
+# vim: dict+=/usr/share/beakerlib/dictionary.vim cpt=.,w,b,u,t,i,k
+
+. /usr/share/beakerlib/beakerlib.sh || exit 1
+
+rlJournalStart
+  rlPhaseStartSetup
+    rlRun "git clone \"$REPO_URL\" repo"
+    rlRun "pushd repo"
+    rlRun "git fetch origin \"$PR_HEAD\""
+    rlRun "git checkout FETCH_HEAD"
+    rlRun "cat /etc/fedora-release"
+    rlRun "dnf -y install postgresql17-server"
+
+    rlRun "autoreconf -vfi" 0 "Building and installing postgresql-setup"
+    rlRun "./configure --prefix=/usr"
+    rlRun "make"
+    rlRun "./bin/postgresql-setup --init" 0 "Initializing database dir"
+    rlRun "systemctl start postgresql" 0 "Starting service"
+    rlRun "systemctl is-active postgresql" 0 "Verifying service running"
+  rlPhaseEnd
+
+  rlPhaseStartTest
+    rlRun "su - postgres -c \"
+    createdb testdb;
+    psql -U postgres -d testdb -c \\\"create table users (id serial primary key, name text)\\\";
+    psql -U postgres -d testdb -c \\\"insert into users (name) values ('Alice'), ('Bob'), ('Celine')\\\"
+    \""
+    rlRun "su - postgres -c '
+    psql -U postgres -d testdb -c \"select * from users\"
+    ' > expected.txt"
+
+    echo "Expected:"
+    cat expected.txt
+
+    rlRun "dnf -y remove postgresql17*" 0 "Removing postgresql 17"
+    rlRun "dnf -y install postgresql18-upgrade" 0 "Installing postgresql 18"
+
+    rlRun "autoreconf -vfi" 0 "Building and installing postgresql-setup"
+    rlRun "./configure --prefix=/usr"
+    rlRun "make"
+
+    rlRun "./bin/postgresql-setup --upgrade" 1 "Upgrading without checksums flags"
+    rlRun "PGSETUP_INITDB_OPTIONS='--no-data-checksums' ./bin/postgresql-setup --upgrade --data-checksums" 0 "Upgrading with contradictory flags"
+
+    rlRun "systemctl start postgresql" 0 "Starting service again"
+    rlRun "systemctl is-active postgresql" 0 "Verifying service running"
+
+    rlRun "su - postgres -c '
+    psql -U postgres -d testdb -c \"select * from users\"
+    ' > actual18.txt"
+
+    echo "Actual:"
+    cat actual18.txt
+
+    rlAssertNotDiffer expected.txt actual18.txt
+    rlRun "systemctl stop postgresql" 0 "Stop service"
+    rlRun "pg_checksums /var/lib/pgsql/data" 1 "Verify checksums not enabled"
+  rlPhaseEnd
+
+  rlPhaseStartCleanup
+    rlRun "popd"
+    rlRun "rm -rf repo"
+    rlRun "systemctl stop postgresql" 0 "Stopping postgresql service"
+    rlRun "rm -rf /var/lib/pgsql" 0 "Removing database folder"
+    rlRun "dnf -y remove postgresql*" 0 "Uninstalling postgresql"
+  rlPhaseEnd
+rlJournalPrintText
+rlJournalEnd
diff --git a/tmt/tests/virtual/checksums/disable/main.fmf b/tmt/tests/virtual/checksums/disable/main.fmf
new file mode 100644
index 0000000..21ca87d
--- /dev/null
+++ b/tmt/tests/virtual/checksums/disable/main.fmf
@@ -0,0 +1,2 @@
+summary: Check if upgrading to postgres 18 without enabling works
+name: checksums-disable
diff --git a/tmt/tests/virtual/checksums/disable/test.sh b/tmt/tests/virtual/checksums/disable/test.sh
new file mode 100755
index 0000000..3589a10
--- /dev/null
+++ b/tmt/tests/virtual/checksums/disable/test.sh
@@ -0,0 +1,69 @@
+#!/bin/bash
+# vim: dict+=/usr/share/beakerlib/dictionary.vim cpt=.,w,b,u,t,i,k
+
+. /usr/share/beakerlib/beakerlib.sh || exit 1
+
+rlJournalStart
+  rlPhaseStartSetup
+    rlRun "git clone \"$REPO_URL\" repo"
+    rlRun "pushd repo"
+    rlRun "git fetch origin \"$PR_HEAD\""
+    rlRun "git checkout FETCH_HEAD"
+    rlRun "cat /etc/fedora-release"
+    rlRun "dnf -y install postgresql17-server"
+
+    rlRun "autoreconf -vfi" 0 "Building and installing postgresql-setup"
+    rlRun "./configure --prefix=/usr"
+    rlRun "make"
+    rlRun "./bin/postgresql-setup --init" 0 "Initializing database dir"
+    rlRun "systemctl start postgresql" 0 "Starting service"
+    rlRun "systemctl is-active postgresql" 0 "Verifying service running"
+  rlPhaseEnd
+
+  rlPhaseStartTest
+    rlRun "su - postgres -c \"
+    createdb testdb;
+    psql -U postgres -d testdb -c \\\"create table users (id serial primary key, name text)\\\";
+    psql -U postgres -d testdb -c \\\"insert into users (name) values ('Alice'), ('Bob'), ('Celine')\\\"
+    \""
+    rlRun "su - postgres -c '
+    psql -U postgres -d testdb -c \"select * from users\"
+    ' > expected.txt"
+
+    echo "Expected:"
+    cat expected.txt
+
+    rlRun "dnf -y remove postgresql17*" 0 "Removing postgresql 17"
+    rlRun "dnf -y install postgresql18-upgrade" 0 "Installing postgresql 18"
+
+    rlRun "autoreconf -vfi" 0 "Building and installing postgresql-setup"
+    rlRun "./configure --prefix=/usr"
+    rlRun "make"
+
+    rlRun "./bin/postgresql-setup --upgrade" 1 "Upgrading without checksums flags"
+    rlRun "PGSETUP_INITDB_OPTIONS='--no-data-checksums' ./bin/postgresql-setup --upgrade" 0 "Upgrading with checksums flag"
+
+    rlRun "systemctl start postgresql" 0 "Starting service again"
+    rlRun "systemctl is-active postgresql" 0 "Verifying service running"
+
+    rlRun "su - postgres -c '
+    psql -U postgres -d testdb -c \"select * from users\"
+    ' > actual18.txt"
+
+    echo "Actual:"
+    cat actual18.txt
+
+    rlAssertNotDiffer expected.txt actual18.txt
+    rlRun "systemctl stop postgresql" 0 "Stop service"
+    rlRun "pg_checksums /var/lib/pgsql/data" 1 "Verify checksums disabled"
+  rlPhaseEnd
+
+  rlPhaseStartCleanup
+    rlRun "popd"
+    rlRun "rm -rf repo"
+    rlRun "systemctl stop postgresql" 0 "Stopping postgresql service"
+    rlRun "rm -rf /var/lib/pgsql" 0 "Removing database folder"
+    rlRun "dnf -y remove postgresql*" 0 "Uninstalling postgresql"
+  rlPhaseEnd
+rlJournalPrintText
+rlJournalEnd
diff --git a/tmt/tests/virtual/checksums/enable/main.fmf b/tmt/tests/virtual/checksums/enable/main.fmf
new file mode 100644
index 0000000..b96b84a
--- /dev/null
+++ b/tmt/tests/virtual/checksums/enable/main.fmf
@@ -0,0 +1,2 @@
+summary: Check if upgrading to postgres 18 with enabling checksums works
+name: checksums-enable
diff --git a/tmt/tests/virtual/checksums/enable/test.sh b/tmt/tests/virtual/checksums/enable/test.sh
new file mode 100755
index 0000000..7a6e916
--- /dev/null
+++ b/tmt/tests/virtual/checksums/enable/test.sh
@@ -0,0 +1,74 @@
+#!/bin/bash
+# vim: dict+=/usr/share/beakerlib/dictionary.vim cpt=.,w,b,u,t,i,k
+
+. /usr/share/beakerlib/beakerlib.sh || exit 1
+
+rlJournalStart
+  rlPhaseStartSetup
+    rlRun "git clone \"$REPO_URL\" repo"
+    rlRun "pushd repo"
+    rlRun "git fetch origin \"$PR_HEAD\""
+    rlRun "git checkout FETCH_HEAD"
+    rlRun "cat /etc/fedora-release"
+    rlRun "dnf -y install postgresql17-server"
+
+    rlRun "autoreconf -vfi" 0 "Building and installing postgresql-setup"
+    rlRun "./configure --prefix=/usr"
+    rlRun "make"
+    rlRun "./bin/postgresql-setup --init" 0 "Initializing database dir"
+    rlRun "systemctl start postgresql" 0 "Starting service"
+    rlRun "systemctl is-active postgresql" 0 "Verifying service running"
+  rlPhaseEnd
+
+  rlPhaseStartTest
+    rlRun "su - postgres -c \"
+    createdb testdb;
+    psql -U postgres -d testdb -c \\\"create table users (id serial primary key, name text)\\\";
+    psql -U postgres -d testdb -c \\\"insert into users (name) values ('Alice'), ('Bob'), ('Celine')\\\"
+    \""
+    rlRun "su - postgres -c '
+    psql -U postgres -d testdb -c \"select * from users\"
+    ' > expected.txt"
+
+    echo "Expected:"
+    cat expected.txt
+
+    rlRun "dnf -y remove postgresql17*" 0 "Removing postgresql 17"
+    rlRun "dnf -y install postgresql18-upgrade" 0 "Installing postgresql 18"
+
+    ./bin/postgresql-setup --help > pre
+
+    rlRun "autoreconf -vfi" 0 "Building and installing postgresql-setup"
+    rlRun "./configure --prefix=/usr"
+    rlRun "make"
+
+    ./bin/postgresql-setup --help > post
+    rlRun "diff pre post" 1 "Verifying help strings differ"
+
+    rlRun "./bin/postgresql-setup --upgrade" 1 "Upgrading without checksums flags"
+    rlRun "./bin/postgresql-setup --upgrade --data-checksums" 0 "Upgrading with checksums flag"
+
+    rlRun "systemctl start postgresql" 0 "Starting service again"
+    rlRun "systemctl is-active postgresql" 0 "Verifying service running"
+
+    rlRun "su - postgres -c '
+    psql -U postgres -d testdb -c \"select * from users\"
+    ' > actual18.txt"
+
+    echo "Actual:"
+    cat actual18.txt
+
+    rlAssertNotDiffer expected.txt actual18.txt
+    rlRun "systemctl stop postgresql" 0 "Stop service"
+    rlRun "pg_checksums /var/lib/pgsql/data" 0 "Verify checksums enabled"
+  rlPhaseEnd
+
+  rlPhaseStartCleanup
+    rlRun "popd"
+    rlRun "rm -rf repo"
+    rlRun "systemctl stop postgresql" 0 "Stopping postgresql service"
+    rlRun "rm -rf /var/lib/pgsql" 0 "Removing database folder"
+    rlRun "dnf -y remove postgresql*" 0 "Uninstalling postgresql"
+  rlPhaseEnd
+rlJournalPrintText
+rlJournalEnd
diff --git a/tmt/tests/virtual/checksums/main.fmf b/tmt/tests/virtual/checksums/main.fmf
new file mode 100644
index 0000000..42c4d8e
--- /dev/null
+++ b/tmt/tests/virtual/checksums/main.fmf
@@ -0,0 +1,16 @@
+require:
+  - make
+  - m4
+  - docbook-utils
+  - help2man
+  - elinks
+  - coreutils
+  - autoconf
+  - automake
+  - autoconf-archive
+  - git
+framework: beakerlib
+contact: pkhartsk@redhat.com
+tag:
+  - fedora-checksums
+test: ./test.sh
diff --git a/tmt/tests/virtual/checksums/pre-existing/main.fmf b/tmt/tests/virtual/checksums/pre-existing/main.fmf
new file mode 100644
index 0000000..ddebf13
--- /dev/null
+++ b/tmt/tests/virtual/checksums/pre-existing/main.fmf
@@ -0,0 +1,2 @@
+summary: Check if upgrading to postgres 18 with already enabled checksums works
+name: checksums-pre-existing
diff --git a/tmt/tests/virtual/checksums/pre-existing/test.sh b/tmt/tests/virtual/checksums/pre-existing/test.sh
new file mode 100755
index 0000000..0d6d5e0
--- /dev/null
+++ b/tmt/tests/virtual/checksums/pre-existing/test.sh
@@ -0,0 +1,68 @@
+#!/bin/bash
+# vim: dict+=/usr/share/beakerlib/dictionary.vim cpt=.,w,b,u,t,i,k
+
+. /usr/share/beakerlib/beakerlib.sh || exit 1
+
+rlJournalStart
+  rlPhaseStartSetup
+    rlRun "git clone \"$REPO_URL\" repo"
+    rlRun "pushd repo"
+    rlRun "git fetch origin \"$PR_HEAD\""
+    rlRun "git checkout FETCH_HEAD"
+    rlRun "cat /etc/fedora-release"
+    rlRun "dnf -y install postgresql17-server"
+
+    rlRun "autoreconf -vfi" 0 "Building and installing postgresql-setup"
+    rlRun "./configure --prefix=/usr"
+    rlRun "make"
+    rlRun "./bin/postgresql-setup --init --data-checksums" 0 "Initializing database dir"
+    rlRun "systemctl start postgresql" 0 "Starting service"
+    rlRun "systemctl is-active postgresql" 0 "Verifying service running"
+  rlPhaseEnd
+
+  rlPhaseStartTest
+    rlRun "su - postgres -c \"
+    createdb testdb;
+    psql -U postgres -d testdb -c \\\"create table users (id serial primary key, name text)\\\";
+    psql -U postgres -d testdb -c \\\"insert into users (name) values ('Alice'), ('Bob'), ('Celine')\\\"
+    \""
+    rlRun "su - postgres -c '
+    psql -U postgres -d testdb -c \"select * from users\"
+    ' > expected.txt"
+
+    echo "Expected:"
+    cat expected.txt
+
+    rlRun "dnf -y remove postgresql17*" 0 "Removing postgresql 17"
+    rlRun "dnf -y install postgresql18-upgrade" 0 "Installing postgresql 18"
+
+    rlRun "./bin/postgresql-setup --upgrade" 0 "Upgrading"
+
+    rlRun "autoreconf -vfi" 0 "Building and installing postgresql-setup"
+    rlRun "./configure --prefix=/usr"
+    rlRun "make"
+
+    rlRun "systemctl start postgresql" 0 "Starting service again"
+    rlRun "systemctl is-active postgresql" 0 "Verifying service running"
+
+    rlRun "su - postgres -c '
+    psql -U postgres -d testdb -c \"select * from users\"
+    ' > actual18.txt"
+
+    echo "Actual:"
+    cat actual18.txt
+
+    rlAssertNotDiffer expected.txt actual18.txt
+    rlRun "systemctl stop postgresql" 0 "Stop service"
+    rlRun "pg_checksums /var/lib/pgsql/data" 0 "Verify checksums enabled"
+  rlPhaseEnd
+
+  rlPhaseStartCleanup
+    rlRun "popd"
+    rlRun "rm -rf repo"
+    rlRun "systemctl stop postgresql" 0 "Stopping postgresql service"
+    rlRun "rm -rf /var/lib/pgsql" 0 "Removing database folder"
+    rlRun "dnf -y remove postgresql*" 0 "Uninstalling postgresql"
+  rlPhaseEnd
+rlJournalPrintText
+rlJournalEnd
diff --git a/tmt/tests/virtual/checksums/pre-pg18/main.fmf b/tmt/tests/virtual/checksums/pre-pg18/main.fmf
new file mode 100644
index 0000000..ffa8317
--- /dev/null
+++ b/tmt/tests/virtual/checksums/pre-pg18/main.fmf
@@ -0,0 +1,2 @@
+summary: Check if upgrading to postgres 17 with enabled checksums works
+name: checksums-pre-pg18
diff --git a/tmt/tests/virtual/checksums/pre-pg18/test.sh b/tmt/tests/virtual/checksums/pre-pg18/test.sh
new file mode 100755
index 0000000..af2cdd6
--- /dev/null
+++ b/tmt/tests/virtual/checksums/pre-pg18/test.sh
@@ -0,0 +1,68 @@
+#!/bin/bash
+# vim: dict+=/usr/share/beakerlib/dictionary.vim cpt=.,w,b,u,t,i,k
+
+. /usr/share/beakerlib/beakerlib.sh || exit 1
+
+rlJournalStart
+  rlPhaseStartSetup
+    rlRun "git clone \"$REPO_URL\" repo"
+    rlRun "pushd repo"
+    rlRun "git fetch origin \"$PR_HEAD\""
+    rlRun "git checkout FETCH_HEAD"
+    rlRun "cat /etc/fedora-release"
+    rlRun "dnf -y install postgresql16-server"
+
+    rlRun "autoreconf -vfi" 0 "Building and installing postgresql-setup"
+    rlRun "./configure --prefix=/usr"
+    rlRun "make"
+    rlRun "./bin/postgresql-setup --init" 0 "Initializing database dir"
+    rlRun "systemctl start postgresql" 0 "Starting service"
+    rlRun "systemctl is-active postgresql" 0 "Verifying service running"
+  rlPhaseEnd
+
+  rlPhaseStartTest
+    rlRun "su - postgres -c \"
+    createdb testdb;
+    psql -U postgres -d testdb -c \\\"create table users (id serial primary key, name text)\\\";
+    psql -U postgres -d testdb -c \\\"insert into users (name) values ('Alice'), ('Bob'), ('Celine')\\\"
+    \""
+    rlRun "su - postgres -c '
+    psql -U postgres -d testdb -c \"select * from users\"
+    ' > expected.txt"
+
+    echo "Expected:"
+    cat expected.txt
+
+    rlRun "dnf -y remove postgresql16*" 0 "Removing postgresql 16"
+    rlRun "dnf -y install postgresql17-upgrade" 0 "Installing postgresql 17"
+
+    rlRun "autoreconf -vfi" 0 "Building and installing postgresql-setup"
+    rlRun "./configure --prefix=/usr"
+    rlRun "make"
+
+    rlRun "./bin/postgresql-setup --upgrade --data-checksums" 0 "Upgrading with checksums flag"
+
+    rlRun "systemctl start postgresql" 0 "Starting service again"
+    rlRun "systemctl is-active postgresql" 0 "Verifying service running"
+
+    rlRun "su - postgres -c '
+    psql -U postgres -d testdb -c \"select * from users\"
+    ' > actual17.txt"
+
+    echo "Actual:"
+    cat actual17.txt
+
+    rlAssertNotDiffer expected.txt actual17.txt
+    rlRun "systemctl stop postgresql" 0 "Stop service"
+    rlRun "pg_checksums /var/lib/pgsql/data" 0 "Verify checksums enabled"
+  rlPhaseEnd
+
+  rlPhaseStartCleanup
+    rlRun "popd"
+    rlRun "rm -rf repo"
+    rlRun "systemctl stop postgresql" 0 "Stopping postgresql service"
+    rlRun "rm -rf /var/lib/pgsql" 0 "Removing database folder"
+    rlRun "dnf -y remove postgresql*" 0 "Uninstalling postgresql"
+  rlPhaseEnd
+rlJournalPrintText
+rlJournalEnd