diff --git a/.github/ISSUE_TEMPLATE/BUG.md b/.github/ISSUE_TEMPLATE/BUG.md
index 0e632865..2f81cb7e 100644
--- a/.github/ISSUE_TEMPLATE/BUG.md
+++ b/.github/ISSUE_TEMPLATE/BUG.md
@@ -14,7 +14,7 @@ labels: bug
 | Q                | A                        |
 |------------------|--------------------------|
 | OS               | macOS / Linux / Windows  |
-| Shell & version  | sh 2.0  / bash 3.2 / ... |
+| Shell & version  | sh 2.0  / bash 3.0 / ... |
 | bashunit version | x.y.z                    |
 
 #### Summary
diff --git a/.github/docker/Dockerfile b/.github/docker/Dockerfile
new file mode 100644
index 00000000..15ac655e
--- /dev/null
+++ b/.github/docker/Dockerfile
@@ -0,0 +1,32 @@
+# Stage 1: Build Bash 3.0 on Ubuntu
+FROM ubuntu:20.04 AS builder
+
+ENV DEBIAN_FRONTEND=noninteractive
+
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
+        build-essential \
+        wget \
+        ca-certificates && \
+    wget https://ftp.gnu.org/gnu/bash/bash-3.0.tar.gz && \
+    tar -xzf bash-3.0.tar.gz && \
+    cd bash-3.0 && \
+    ./configure --prefix=/bash3 --build=x86_64-unknown-linux-gnu && \
+    make && make install && \
+    cd .. && \
+    rm -rf bash-3.0*
+
+# Stage 2: Minimal Alpine with Bash 3.0
+FROM alpine:3.18
+
+# Copy compiled Bash 3.0 from the builder
+COPY --from=builder /bash3 /bash3
+
+# Create the canonical /usr/bin/bash symlink
+RUN ln -sf /bash3/bin/bash /usr/bin/bash
+
+# Optional: Test version
+RUN /usr/bin/bash --version
+
+WORKDIR /project
+CMD ["/usr/bin/bash"]
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 33648025..10def780 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -80,6 +80,22 @@ jobs:
             chown -R builder /project && \
             su - builder -c 'cd /project; make test';"
 
+  bash30:
+    name: "Bash 3.0"
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
+
+      - name: Build test image
+        run: docker build -t bash3 -f .github/docker/Dockerfile .
+
+      - name: Run Tests
+        run: |
+          docker run --rm -v "$(pwd)":/project -w /project bash3 make test
+
   simple-output:
     name: "Simple output"
     runs-on: ubuntu-latest
diff --git a/CHANGELOG.md b/CHANGELOG.md
index d4f5526c..bfb7e448 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@
 - Add support for `.bash` test files
 - Add runtime check for Bash >= 3.2
 - Add fallback for clock with seconds resolution only
+- Lower minimum supported Bash version to 3.0
 
 ## [0.22.3](https://github.com/TypedDevs/bashunit/compare/0.22.2...0.22.3) - 2025-07-27
 
diff --git a/README.md b/README.md
index 225950ec..50306e98 100644
--- a/README.md
+++ b/README.md
@@ -40,7 +40,7 @@ You can find the complete documentation for **bashunit** online, including insta
 
 ## Requirements
 
-bashunit requires **Bash 3.2** or newer.
+bashunit requires **Bash 3.0** or newer.
 
 ## Contribute
 
diff --git a/bashunit b/bashunit
index 38e22b94..185e316b 100755
--- a/bashunit
+++ b/bashunit
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-declare -r BASHUNIT_MIN_BASH_VERSION="3.2"
+declare -r BASHUNIT_MIN_BASH_VERSION="3.0"
 
 function _check_bash_version() {
   local current_version
@@ -19,7 +19,10 @@ function _check_bash_version() {
   local major minor
   IFS=. read -r major minor _ <<< "$current_version"
 
-  if (( major < 3 )) || { (( major == 3 )) && (( minor < 2 )); }; then
+  local min_major min_minor
+  IFS=. read -r min_major min_minor _ <<< "$BASHUNIT_MIN_BASH_VERSION"
+
+  if (( major < min_major )) || { (( major == min_major )) && (( minor < min_minor )); }; then
     printf 'Bashunit requires Bash >= %s. Current version: %s\n' "$BASHUNIT_MIN_BASH_VERSION" "$current_version" >&2
     exit 1
   fi
@@ -145,7 +148,7 @@ while [[ $# -gt 0 ]]; do
       trap '' EXIT && exit 0
       ;;
     *)
-      _RAW_ARGS+=("$1")
+      _RAW_ARGS[${#_RAW_ARGS[@]}]="$1"
       ;;
   esac
   shift
@@ -157,7 +160,7 @@ if [[ ${#_RAW_ARGS[@]} -gt 0 ]]; then
   [[ "$_BENCH_MODE" == true ]] && pattern='*[bB]ench.sh'
   for arg in "${_RAW_ARGS[@]}"; do
     while IFS= read -r file; do
-      _ARGS+=("$file")
+      _ARGS[${#_ARGS[@]}]="$file"
     done < <(helper::find_files_recursive "$arg" "$pattern")
   done
 fi
diff --git a/docs/installation.md b/docs/installation.md
index c7544fa7..0b956cb0 100644
--- a/docs/installation.md
+++ b/docs/installation.md
@@ -7,7 +7,7 @@ Here, we provide different options that you can use to install **bashunit** in y
 
 ## Requirements
 
-bashunit requires **Bash 3.2** or newer.
+bashunit requires **Bash 3.0** or newer.
 
 ## install.sh
 
diff --git a/src/benchmark.sh b/src/benchmark.sh
index 32b9eb91..75eae808 100644
--- a/src/benchmark.sh
+++ b/src/benchmark.sh
@@ -42,11 +42,11 @@ function benchmark::parse_annotations() {
 }
 
 function benchmark::add_result() {
-  _BENCH_NAMES+=("$1")
-  _BENCH_REVS+=("$2")
-  _BENCH_ITS+=("$3")
-  _BENCH_AVERAGES+=("$4")
-  _BENCH_MAX_MILLIS+=("$5")
+  _BENCH_NAMES[${#_BENCH_NAMES[@]}]="$1"
+  _BENCH_REVS[${#_BENCH_REVS[@]}]="$2"
+  _BENCH_ITS[${#_BENCH_ITS[@]}]="$3"
+  _BENCH_AVERAGES[${#_BENCH_AVERAGES[@]}]="$4"
+  _BENCH_MAX_MILLIS[${#_BENCH_MAX_MILLIS[@]}]="$5"
 }
 
 # shellcheck disable=SC2155
@@ -67,7 +67,7 @@ function benchmark::run_function() {
     local end_time=$(clock::now)
     local dur_ns=$(math::calculate "($end_time - $start_time)")
     local dur_ms=$(math::calculate "$dur_ns / 1000000")
-    durations+=("$dur_ms")
+    durations[${#durations[@]}]="$dur_ms"
 
     if env::is_bench_mode_enabled; then
       local label="$(helper::normalize_test_function_name "$fn_name")"
diff --git a/src/clock.sh b/src/clock.sh
index 27aed6cf..6ed430f3 100644
--- a/src/clock.sh
+++ b/src/clock.sh
@@ -7,34 +7,34 @@ function clock::_choose_impl() {
   local attempts=()
 
   # 1. Try Perl with Time::HiRes
-  attempts+=("Perl")
+  attempts[${#attempts[@]}]="Perl"
   if dependencies::has_perl && perl -MTime::HiRes -e "" &>/dev/null; then
     _CLOCK_NOW_IMPL="perl"
     return 0
   fi
 
   # 2. Try Python 3 with time module
-  attempts+=("Python")
+  attempts[${#attempts[@]}]="Python"
   if dependencies::has_python; then
     _CLOCK_NOW_IMPL="python"
     return 0
   fi
 
   # 3. Try Node.js
-  attempts+=("Node")
+  attempts[${#attempts[@]}]="Node"
   if dependencies::has_node; then
     _CLOCK_NOW_IMPL="node"
     return 0
   fi
   # 4. Windows fallback with PowerShell
-  attempts+=("PowerShell")
+  attempts[${#attempts[@]}]="PowerShell"
   if check_os::is_windows && dependencies::has_powershell; then
     _CLOCK_NOW_IMPL="powershell"
     return 0
   fi
 
   # 5. Unix fallback using `date +%s%N` (if not macOS or Alpine)
-  attempts+=("date")
+  attempts[${#attempts[@]}]="date"
   if ! check_os::is_macos && ! check_os::is_alpine; then
     local result
     result=$(date +%s%N 2>/dev/null)
@@ -45,7 +45,7 @@ function clock::_choose_impl() {
   fi
 
   # 6. Try using native shell EPOCHREALTIME (if available)
-  attempts+=("EPOCHREALTIME")
+  attempts[${#attempts[@]}]="EPOCHREALTIME"
   if shell_time="$(clock::shell_time)"; then
     _CLOCK_NOW_IMPL="shell"
     return 0
diff --git a/src/console_results.sh b/src/console_results.sh
index 92d18723..bc2b2e54 100644
--- a/src/console_results.sh
+++ b/src/console_results.sh
@@ -172,10 +172,11 @@ ${_COLOR_FAILED}✗ Failed${_COLOR_DEFAULT}: %s
     "${function_name}" "${expected}" "${failure_condition_message}" "${actual}")"
 
   if [ -n "$extra_key" ]; then
-    line+="$(printf "\
-
-    ${_COLOR_FAINT}%s${_COLOR_DEFAULT} ${_COLOR_BOLD}'%s'${_COLOR_DEFAULT}\n" \
-    "${extra_key}" "${extra_value}")"
+    line="${line}$(
+      printf "%s%s %s'%s'%s\n" \
+        "${_COLOR_FAINT}" "${extra_key}" \
+        "${_COLOR_BOLD}" "${extra_value}" "${_COLOR_DEFAULT}"
+    )"
   fi
 
   state::print_line "failed" "$line"
@@ -200,7 +201,7 @@ function console_results::print_failed_snapshot_test() {
       "$snapshot_file" "$actual_file" 2>/dev/null \
         | tail -n +6 | sed "s/^/    /")"
 
-    line+="$git_diff_output"
+    line="${line}$git_diff_output"
     rm "$actual_file"
   fi
 
@@ -215,7 +216,7 @@ function console_results::print_skipped_test() {
   line="$(printf "${_COLOR_SKIPPED}↷ Skipped${_COLOR_DEFAULT}: %s\n" "${function_name}")"
 
   if [[ -n "$reason" ]]; then
-    line+="$(printf "${_COLOR_FAINT}    %s${_COLOR_DEFAULT}\n" "${reason}")"
+    line="${line}$(printf "${_COLOR_FAINT}    %s${_COLOR_DEFAULT}\n" "${reason}")"
   fi
 
   state::print_line "skipped" "$line"
@@ -229,7 +230,7 @@ function console_results::print_incomplete_test() {
   line="$(printf "${_COLOR_INCOMPLETE}✒ Incomplete${_COLOR_DEFAULT}: %s\n" "${function_name}")"
 
   if [[ -n "$pending" ]]; then
-    line+="$(printf "${_COLOR_FAINT}    %s${_COLOR_DEFAULT}\n" "${pending}")"
+    line="${line}$(printf "${_COLOR_FAINT}    %s${_COLOR_DEFAULT}\n" "${pending}")"
   fi
 
   state::print_line "incomplete" "$line"
diff --git a/src/globals.sh b/src/globals.sh
index e11705fc..5eb62998 100644
--- a/src/globals.sh
+++ b/src/globals.sh
@@ -32,7 +32,7 @@ function random_str() {
   local chars='abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
   local str=''
   for (( i=0; i<length; i++ )); do
-    str+="${chars:RANDOM%${#chars}:1}"
+    str="${str}${chars:RANDOM%${#chars}:1}"
   done
   echo "$str"
 }
diff --git a/src/helpers.sh b/src/helpers.sh
index fe988eb2..246599b0 100755
--- a/src/helpers.sh
+++ b/src/helpers.sh
@@ -99,7 +99,7 @@ function helper::get_functions_to_run() {
       if [[ $filtered_functions == *" $fn"* ]]; then
         return 1
       fi
-      filtered_functions+=" $fn"
+      filtered_functions="${filtered_functions} $fn"
     fi
   done
 
@@ -239,7 +239,7 @@ function helpers::find_total_tests() {
                 for fn_name in "${functions_to_run[@]}"; do
                     local provider_data=()
                     while IFS=" " read -r line; do
-                        provider_data+=("$line")
+                        provider_data[${#provider_data[@]}]="$line"
                     done <<< "$(helper::get_provider_data "$fn_name" "$file")"
 
                     if [[ "${#provider_data[@]}" -eq 0 ]]; then
@@ -268,7 +268,7 @@ function helper::load_test_files() {
   if [[ "${#files[@]}" -eq 0 ]]; then
     if [[ -n "${BASHUNIT_DEFAULT_PATH}" ]]; then
       while IFS='' read -r line; do
-        test_files+=("$line")
+        test_files[${#test_files[@]}]="$line"
       done < <(helper::find_files_recursive "$BASHUNIT_DEFAULT_PATH")
     fi
   else
@@ -287,7 +287,7 @@ function helper::load_bench_files() {
   if [[ "${#files[@]}" -eq 0 ]]; then
     if [[ -n "${BASHUNIT_DEFAULT_PATH}" ]]; then
       while IFS='' read -r line; do
-        bench_files+=("$line")
+        bench_files[${#bench_files[@]}]="$line"
       done < <(helper::find_files_recursive "$BASHUNIT_DEFAULT_PATH" '*[bB]ench.sh')
     fi
   else
diff --git a/src/main.sh b/src/main.sh
index f9945b9f..e1a489a1 100644
--- a/src/main.sh
+++ b/src/main.sh
@@ -6,7 +6,7 @@ function main::exec_tests() {
 
   local test_files=()
   while IFS= read -r line; do
-    test_files+=("$line")
+    test_files[${#test_files[@]}]="$line"
   done < <(helper::load_test_files "$filter" "${files[@]}")
 
   internal_log "exec_tests" "filter:$filter" "files:${test_files[*]}"
@@ -81,7 +81,7 @@ function main::exec_benchmarks() {
 
   local bench_files=()
   while IFS= read -r line; do
-    bench_files+=("$line")
+    bench_files[${#bench_files[@]}]="$line"
   done < <(helper::load_bench_files "$filter" "${files[@]}")
 
   internal_log "exec_benchmarks" "filter:$filter" "files:${bench_files[*]}"
@@ -147,7 +147,7 @@ function main::exec_assert() {
       inner_exit_code=$?
       # Remove the last argument and append the exit code
       args=("${args[@]:0:last_index}")
-      args+=("$inner_exit_code")
+      args[${#args[@]}]="$inner_exit_code"
       ;;
     *)
       # Add more cases here for other assert_* handlers if needed
diff --git a/src/reports.sh b/src/reports.sh
index 45590a03..464f2bc6 100755
--- a/src/reports.sh
+++ b/src/reports.sh
@@ -34,11 +34,11 @@ function reports::add_test() {
   local assertions="$4"
   local status="$5"
 
-  _REPORTS_TEST_FILES+=("$file")
-  _REPORTS_TEST_NAMES+=("$test_name")
-  _REPORTS_TEST_STATUSES+=("$status")
-  _REPORTS_TEST_ASSERTIONS+=("$assertions")
-  _REPORTS_TEST_DURATIONS+=("$duration")
+  _REPORTS_TEST_FILES[${#_REPORTS_TEST_FILES[@]}]="$file"
+  _REPORTS_TEST_NAMES[${#_REPORTS_TEST_NAMES[@]}]="$test_name"
+  _REPORTS_TEST_STATUSES[${#_REPORTS_TEST_STATUSES[@]}]="$status"
+  _REPORTS_TEST_ASSERTIONS[${#_REPORTS_TEST_ASSERTIONS[@]}]="$assertions"
+  _REPORTS_TEST_DURATIONS[${#_REPORTS_TEST_DURATIONS[@]}]="$duration"
 }
 
 function reports::generate_junit_xml() {
diff --git a/src/runner.sh b/src/runner.sh
index b6937620..c47b2c27 100755
--- a/src/runner.sh
+++ b/src/runner.sh
@@ -104,7 +104,7 @@ function runner::call_test_functions() {
 
     local provider_data=()
     while IFS=" " read -r line; do
-      provider_data+=("$line")
+      provider_data[${#provider_data[@]}]="$line"
     done <<< "$(helper::get_provider_data "$fn_name" "$script")"
 
     # No data provider found
@@ -431,11 +431,11 @@ function runner::parse_result_sync() {
 
   local regex
   regex='ASSERTIONS_FAILED=([0-9]*)##'
-  regex+='ASSERTIONS_PASSED=([0-9]*)##'
-  regex+='ASSERTIONS_SKIPPED=([0-9]*)##'
-  regex+='ASSERTIONS_INCOMPLETE=([0-9]*)##'
-  regex+='ASSERTIONS_SNAPSHOT=([0-9]*)##'
-  regex+='TEST_EXIT_CODE=([0-9]*)'
+  regex="${regex}ASSERTIONS_PASSED=([0-9]*)##"
+  regex="${regex}ASSERTIONS_SKIPPED=([0-9]*)##"
+  regex="${regex}ASSERTIONS_INCOMPLETE=([0-9]*)##"
+  regex="${regex}ASSERTIONS_SNAPSHOT=([0-9]*)##"
+  regex="${regex}TEST_EXIT_CODE=([0-9]*)"
 
   if [[ $result_line =~ $regex ]]; then
     assertions_failed="${BASH_REMATCH[1]}"
diff --git a/src/state.sh b/src/state.sh
index 8d8fc7ed..03b232a0 100644
--- a/src/state.sh
+++ b/src/state.sh
@@ -121,7 +121,7 @@ function state::set_file_with_duplicated_function_names() {
 }
 
 function state::add_test_output() {
-  _TEST_OUTPUT+="$1"
+  _TEST_OUTPUT="${_TEST_OUTPUT}$1"
 }
 
 function state::get_test_exit_code() {
diff --git a/src/str.sh b/src/str.sh
index 20de60a8..6d8ebdb8 100644
--- a/src/str.sh
+++ b/src/str.sh
@@ -33,14 +33,14 @@ function str::rpad() {
     # If the current character is part of an ANSI sequence, skip it and copy it
     if [[ "$original_char" == $'\x1b' ]]; then
       while [[ "${left_text:$j:1}" != "m" && $j -lt ${#left_text} ]]; do
-        result_left_text+="${left_text:$j:1}"
+        result_left_text="${result_left_text}${left_text:$j:1}"
         ((j++))
       done
-      result_left_text+="${left_text:$j:1}"  # Append the final 'm'
+      result_left_text="${result_left_text}${left_text:$j:1}"  # Append the final 'm'
       ((j++))
     elif [[ "$char" == "$original_char" ]]; then
       # Match the actual character
-      result_left_text+="$char"
+      result_left_text="${result_left_text}$char"
       ((i++))
       ((j++))
     else
@@ -50,13 +50,13 @@ function str::rpad() {
 
   local remaining_space
   if $is_truncated ; then
-    result_left_text+="..."
+    result_left_text="${result_left_text}..."
     # 1: due to a blank space
     # 3: due to the appended ...
     remaining_space=$((width_padding - ${#clean_left_text} - ${#right_word} - 1 - 3))
   else
     # Copy any remaining characters after the truncation point
-    result_left_text+="${left_text:$j}"
+    result_left_text="${result_left_text}${left_text:$j}"
     remaining_space=$((width_padding - ${#clean_left_text} - ${#right_word} - 1))
   fi
 
diff --git a/src/test_doubles.sh b/src/test_doubles.sh
index fb216aed..e14521c7 100644
--- a/src/test_doubles.sh
+++ b/src/test_doubles.sh
@@ -34,7 +34,7 @@ function mock() {
 
   export -f "${command?}"
 
-  MOCKED_FUNCTIONS+=("$command")
+  MOCKED_FUNCTIONS[${#MOCKED_FUNCTIONS[@]}]="$command"
 }
 
 function spy() {
@@ -60,7 +60,7 @@ function spy() {
 
   export -f "${command?}"
 
-  MOCKED_FUNCTIONS+=("$command")
+  MOCKED_FUNCTIONS[${#MOCKED_FUNCTIONS[@]}]="$command"
 }
 
 function assert_have_been_called() {
diff --git a/tests/unit/bash_version_test.sh b/tests/unit/bash_version_test.sh
index b82fb561..674ca488 100755
--- a/tests/unit/bash_version_test.sh
+++ b/tests/unit/bash_version_test.sh
@@ -1,8 +1,8 @@
 #!/usr/bin/env bash
 
 function test_fail_with_old_bash_version() {
-  output=$(BASHUNIT_TEST_BASH_VERSION=3.1 ./bashunit --version 2>&1)
+  output=$(BASHUNIT_TEST_BASH_VERSION=2.9 ./bashunit --version 2>&1)
   exit_code=$?
-  assert_contains "Bashunit requires Bash >= 3.2. Current version: 3.1" "$output"
+  assert_contains "Bashunit requires Bash >= 3.0. Current version: 2.9" "$output"
   assert_general_error "$output" "" "$exit_code"
 }