diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 1444499..d74ba69 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -10,6 +10,15 @@ on:
       - dev
 
 jobs:
+  installer:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+
+      - name: Test installer platform detection
+        run: sh scripts/test-get-cli.sh
+
   build:
     runs-on: ubuntu-latest
     strategy:
diff --git a/get-cli.sh b/get-cli.sh
index 04f7978..1dfa3ac 100644
--- a/get-cli.sh
+++ b/get-cli.sh
@@ -71,7 +71,14 @@ detect_platform() {
     case "$(uname -m)" in
         x86_64|amd64) arch="amd64" ;;
         arm64|aarch64) arch="arm64" ;;
-        armv7l|armv6l)
+        armv6l)
+            if [ "$os" = "linux" ]; then
+                arch="arm32v6"
+            else
+                arch="arm64"
+            fi
+            ;;
+        armv7l)
             if [ "$os" = "linux" ]; then
                 arch="arm32"
             else
diff --git a/scripts/test-get-cli.sh b/scripts/test-get-cli.sh
new file mode 100644
index 0000000..1de902f
--- /dev/null
+++ b/scripts/test-get-cli.sh
@@ -0,0 +1,47 @@
+#!/bin/sh
+set -eu
+
+repo_dir=$(CDPATH= cd -- "$(dirname -- "$0")/.." && pwd)
+
+# Load the installer functions without running the installation entry point.
+eval "$(sed '/^main "\$@"$/d' "$repo_dir/get-cli.sh")"
+
+uname() {
+    case "$1" in
+        -s) printf '%s' "$test_os" ;;
+        -m) printf '%s' "$test_arch" ;;
+        *) return 1 ;;
+    esac
+}
+
+check_platform() {
+    test_os=$1
+    test_arch=$2
+    expected=$3
+    actual=$(detect_platform)
+    if [ "$actual" != "$expected" ]; then
+        printf 'FAIL: %s/%s: expected %s, got %s\n' "$test_os" "$test_arch" "$expected" "$actual" >&2
+        exit 1
+    fi
+    printf 'PASS: %s/%s -> %s\n' "$test_os" "$test_arch" "$actual"
+}
+
+check_platform Linux armv6l linux_arm32v6
+check_platform Linux armv7l linux_arm32
+check_platform Linux aarch64 linux_arm64
+check_platform Linux arm64 linux_arm64
+check_platform Linux x86_64 linux_amd64
+check_platform Linux amd64 linux_amd64
+check_platform Linux riscv64 linux_riscv64
+check_platform Darwin arm64 darwin_arm64
+check_platform Darwin x86_64 darwin_amd64
+check_platform FreeBSD amd64 freebsd_amd64
+check_platform MINGW64_NT-10.0 x86_64 windows_amd64
+
+test_os=Linux
+test_arch=unsupported
+if (detect_platform) >/dev/null 2>&1; then
+    printf 'FAIL: unsupported architecture was accepted\n' >&2
+    exit 1
+fi
+printf 'PASS: unsupported architecture is rejected\n'