diff --git a/.github/workflows/unit-tests.yml b/.github/workflows/unit-tests.yml
index 1da6a2731..48fe5d57e 100644
--- a/.github/workflows/unit-tests.yml
+++ b/.github/workflows/unit-tests.yml
@@ -66,6 +66,9 @@ jobs:
       - name: Run bats (ublue-bling)
         run: bats tests/test_bling.bats
 
+      - name: Run bats (bling.sh)
+        run: bats tests/test_bling_sh.bats
+
       - name: Run bats (luks-tpm2-autounlock)
         run: bats tests/test_luks_tpm2.bats
 
diff --git a/tests/test_bling_sh.bats b/tests/test_bling_sh.bats
new file mode 100644
index 000000000..cff7f5009
--- /dev/null
+++ b/tests/test_bling_sh.bats
@@ -0,0 +1,181 @@
+#!/usr/bin/env bats
+
+BLING_SCRIPT="$BATS_TEST_DIRNAME/../system_files/shared/usr/share/ublue-os/bling/bling.sh"
+BASH_BIN="$(command -v bash)"
+WORKDIR=""
+MOCKDIR=""
+BASEBIN=""
+CALL_LOG=""
+
+setup() {
+    WORKDIR="$BATS_TEST_DIRNAME/.tmp/test_bling_sh_${BATS_TEST_NUMBER}_$$"
+    MOCKDIR="$WORKDIR/mockbin"
+    BASEBIN="$WORKDIR/basebin"
+    CALL_LOG="$WORKDIR/calls.log"
+
+    mkdir -p "$MOCKDIR" "$BASEBIN" "$WORKDIR/home"
+    ln -s "$(command -v basename)" "$BASEBIN/basename"
+    ln -s "$(command -v readlink)" "$BASEBIN/readlink"
+    ln -s "$(command -v sh)" "$BASEBIN/sh"
+    : > "$CALL_LOG"
+}
+
+teardown() {
+    rm -rf "$WORKDIR"
+}
+
+run_bling() {
+    run env -i \
+        PATH="$MOCKDIR:$BASEBIN" \
+        HOME="$WORKDIR/home" \
+        CALL_LOG="$CALL_LOG" \
+        BLING_SCRIPT="$BLING_SCRIPT" \
+        "$BASH_BIN" --noprofile --norc -c "$1"
+}
+
+assert_alias_defined() {
+    local alias_name="$1"
+    local expected="$2"
+
+    run_bling 'source "$BLING_SCRIPT"; alias '"\"$alias_name\""' 2>/dev/null'
+    [ "$status" -eq 0 ]
+    [[ "$output" == *"$expected"* ]]
+}
+
+assert_alias_missing() {
+    local alias_name="$1"
+
+    run_bling 'source "$BLING_SCRIPT"; alias '"\"$alias_name\""' 2>/dev/null'
+    [ "$status" -ne 0 ]
+    [ -z "$output" ]
+}
+
+make_mock() {
+    local name="$1"
+    shift
+
+    cat <<EOF_MOCK > "$MOCKDIR/$name"
+#!/usr/bin/env sh
+$*
+EOF_MOCK
+    chmod +x "$MOCKDIR/$name"
+}
+
+make_direnv_mock() {
+    make_mock direnv '
+printf "%s\\n" "direnv $1 $2" >> "$CALL_LOG"
+if [ "$1" = "hook" ]; then
+    printf "export DIRENV_INIT=1\\nexport DIRENV_SHELL=%s\\n" "$2"
+fi
+'
+}
+
+make_starship_mock() {
+    make_mock starship '
+printf "%s\\n" "starship $1 $2" >> "$CALL_LOG"
+if [ "$1" = "init" ]; then
+    printf "export STARSHIP_INIT=1\\nexport STARSHIP_SHELL=%s\\n" "$2"
+fi
+'
+}
+
+make_zoxide_mock() {
+    make_mock zoxide '
+printf "%s\\n" "zoxide $1 $2" >> "$CALL_LOG"
+if [ "$1" = "init" ]; then
+    printf "export ZOXIDE_INIT=1\\nexport ZOXIDE_SHELL=%s\\n" "$2"
+fi
+'
+}
+
+make_mise_mock() {
+    make_mock mise '
+printf "%s\\n" "mise $1 $2" >> "$CALL_LOG"
+if [ "$1" = "activate" ]; then
+    printf "export MISE_INIT=1\\nexport MISE_SHELL=%s\\n" "$2"
+fi
+'
+}
+
+@test "bling.sh sources only once when BLING_SOURCED is set" {
+    make_direnv_mock
+    make_starship_mock
+    make_zoxide_mock
+    make_mise_mock
+
+    run_bling 'source "$BLING_SCRIPT"; source "$BLING_SCRIPT"; printf "%s" "$BLING_SOURCED"'
+    [ "$status" -eq 0 ]
+    [ "$output" = "1" ]
+    [ "$(grep -c '^direnv hook bash$' "$CALL_LOG")" -eq 1 ]
+    [ "$(grep -c '^starship init bash$' "$CALL_LOG")" -eq 1 ]
+    [ "$(grep -c '^zoxide init bash$' "$CALL_LOG")" -eq 1 ]
+    [ "$(grep -c '^mise activate bash$' "$CALL_LOG")" -eq 1 ]
+}
+
+@test "bling.sh defines eza aliases when eza exists" {
+    make_mock eza 'exit 0'
+
+    assert_alias_defined ll "alias ll='eza -l --icons=auto --group-directories-first'"
+    assert_alias_defined l. "alias l.='eza -d .*'"
+    assert_alias_defined ls "alias ls='eza'"
+    assert_alias_defined l1 "alias l1='eza -1'"
+}
+
+@test "bling.sh skips eza aliases when eza is missing" {
+    assert_alias_missing ll
+    assert_alias_missing l.
+    assert_alias_missing ls
+    assert_alias_missing l1
+}
+
+@test "bling.sh defines bat alias when bat exists" {
+    make_mock bat 'exit 0'
+
+    assert_alias_defined cat "alias cat='bat --style=plain --pager=never'"
+}
+
+@test "bling.sh skips bat alias when bat is missing" {
+    assert_alias_missing cat
+}
+
+@test "bling.sh defines ug aliases when ug exists" {
+    make_mock ug 'exit 0'
+
+    assert_alias_defined grep "alias grep='ug'"
+    assert_alias_defined egrep "alias egrep='ug -E'"
+    assert_alias_defined fgrep "alias fgrep='ug -F'"
+    assert_alias_defined xzgrep "alias xzgrep='ug -z'"
+    assert_alias_defined xzegrep "alias xzegrep='ug -zE'"
+    assert_alias_defined xzfgrep "alias xzfgrep='ug -zF'"
+}
+
+@test "bling.sh skips ug aliases when ug is missing" {
+    assert_alias_missing grep
+    assert_alias_missing egrep
+    assert_alias_missing fgrep
+    assert_alias_missing xzgrep
+    assert_alias_missing xzegrep
+    assert_alias_missing xzfgrep
+}
+
+@test "bling.sh initializes available shell hooks" {
+    make_direnv_mock
+    make_starship_mock
+    make_zoxide_mock
+    make_mise_mock
+
+    run_bling 'source "$BLING_SCRIPT"; printf "%s|%s|%s|%s|%s|%s|%s|%s" "${DIRENV_INIT:-}" "${DIRENV_SHELL:-}" "${STARSHIP_INIT:-}" "${STARSHIP_SHELL:-}" "${ZOXIDE_INIT:-}" "${ZOXIDE_SHELL:-}" "${MISE_INIT:-}" "${MISE_SHELL:-}"'
+    [ "$status" -eq 0 ]
+    [ "$output" = "1|bash|1|bash|1|bash|1|bash" ]
+    [ "$(grep -c '^direnv hook bash$' "$CALL_LOG")" -eq 1 ]
+    [ "$(grep -c '^starship init bash$' "$CALL_LOG")" -eq 1 ]
+    [ "$(grep -c '^zoxide init bash$' "$CALL_LOG")" -eq 1 ]
+    [ "$(grep -c '^mise activate bash$' "$CALL_LOG")" -eq 1 ]
+}
+
+@test "bling.sh degrades gracefully when shell hook tools are missing" {
+    run_bling 'source "$BLING_SCRIPT"; printf "%s|%s|%s|%s" "${DIRENV_INIT:-missing}" "${STARSHIP_INIT:-missing}" "${ZOXIDE_INIT:-missing}" "${MISE_INIT:-missing}"'
+    [ "$status" -eq 0 ]
+    [ "$output" = "missing|missing|missing|missing" ]
+    [ ! -s "$CALL_LOG" ]
+}