diff --git a/action.yml b/action.yml
index d79c655..159b51c 100644
--- a/action.yml
+++ b/action.yml
@@ -78,69 +78,28 @@ runs:
         echo GOOGLE_CHROME_OPTS_ARGS="headless,disable-gpu,no-sandbox,disable-dev-shm-usage" >> $GITHUB_ENV
       shell: bash
 
-    - name: Set up PostgreSQL database connection for testing
+    - name: Set up PostgreSQL database
       if: ${{ startsWith(inputs.database, 'postgres:') }}
-      run: |
-        sudo apt-get install -y --no-install-recommends libpq-dev
-
-        docker run \
-          --name redmine-postgres \
-          -e POSTGRES_PASSWORD=postgres \
-          -p 5432:5432 \
-          -d ${{ inputs.database }}
-
-        cat <<EOS > config/database.yml
-          test:
-            adapter: postgresql
-            database: redmine_test
-            encoding: utf8
-            host: localhost
-            port: 5432
-            username: postgres
-            password: postgres
-        EOS
+      run: ./scripts/setup-postgresql.sh
       shell: bash
-      working-directory: ${{ inputs.path }}
+      env:
+        REDMINE_DIR: ${{ inputs.path }}
+        DATABASE: ${{ inputs.database }}
 
-    - name: Set up MySQL database connection for testing
+    - name: Set up MySQL database
       if: ${{ startsWith(inputs.database, 'mysql:') }}
-      run: |
-        sudo apt-get install -y --no-install-recommends default-mysql-client
-
-        docker run \
-          --name redmine-mysql \
-          -e MYSQL_ROOT_PASSWORD=password \
-          -e MYSQL_DATABASE=redmine_test \
-          -p 3306:3306 \
-          -d ${{ inputs.database }} \
-          --character-set-server=utf8mb4 \
-          --collation-server=utf8mb4_unicode_ci
-
-        cat <<EOS > config/database.yml
-          test:
-            adapter: mysql2
-            database: redmine_test
-            host: 127.0.0.1
-            port: 3306
-            username: root
-            password: password
-            encoding: utf8mb4
-        EOS
+      run: ./scripts/setup-mysql.sh
       shell: bash
-      working-directory: ${{ inputs.path }}
+      env:
+        REDMINE_DIR: ${{ inputs.path }}
+        DATABASE: ${{ inputs.database }}
 
-    - name: Set up SQLite3 database connection for testing
+    - name: Set up SQLite3 database
       if: ${{ inputs.database == 'sqlite3' }}
-      run: |
-        sudo apt-get install -y --no-install-recommends libsqlite3-dev
-
-        cat <<EOS > config/database.yml
-          test:
-            adapter: sqlite3
-            database: db/test.sqlite3
-        EOS
+      run: ./scripts/setup-sqlite3.sh
       shell: bash
-      working-directory: ${{ inputs.path }}
+      env:
+        REDMINE_DIR: ${{ inputs.path }}
 
       # https://www.redmine.org/issues/40802
     - name: Fix LoadError in Redmine 4.2
diff --git a/scripts/setup-mysql.sh b/scripts/setup-mysql.sh
new file mode 100755
index 0000000..63aa79e
--- /dev/null
+++ b/scripts/setup-mysql.sh
@@ -0,0 +1,26 @@
+#!/bin/bash
+
+set -eu
+
+sudo apt-get install -y --no-install-recommends default-mysql-client
+
+docker run \
+  --name redmine-mysql \
+  -e MYSQL_ROOT_PASSWORD=password \
+  -e MYSQL_DATABASE=redmine_test \
+  -p 3306:3306 \
+  -d $DATABASE \
+  --character-set-server=utf8mb4 \
+  --collation-server=utf8mb4_unicode_ci
+
+cd $REDMINE_DIR
+cat <<EOS > config/database.yml
+  test:
+    adapter: mysql2
+    database: redmine_test
+    host: 127.0.0.1
+    port: 3306
+    username: root
+    password: password
+    encoding: utf8mb4
+EOS
diff --git a/scripts/setup-postgresql.sh b/scripts/setup-postgresql.sh
new file mode 100755
index 0000000..f9f335f
--- /dev/null
+++ b/scripts/setup-postgresql.sh
@@ -0,0 +1,23 @@
+#!/bin/bash
+
+set -eu
+
+sudo apt-get install -y --no-install-recommends libpq-dev
+
+docker run \
+  --name redmine-postgres \
+  -e POSTGRES_PASSWORD=postgres \
+  -p 5432:5432 \
+  -d $DATABASE
+
+cd $REDMINE_DIR
+cat <<EOS > config/database.yml
+  test:
+    adapter: postgresql
+    database: redmine_test
+    encoding: utf8
+    host: localhost
+    port: 5432
+    username: postgres
+    password: postgres
+EOS
diff --git a/scripts/setup-sqlite3.sh b/scripts/setup-sqlite3.sh
new file mode 100755
index 0000000..6ec867a
--- /dev/null
+++ b/scripts/setup-sqlite3.sh
@@ -0,0 +1,12 @@
+#!/bin/bash
+
+set -eu
+
+sudo apt-get install -y --no-install-recommends libsqlite3-dev
+
+cd $REDMINE_DIR
+cat <<EOS > config/database.yml
+  test:
+    adapter: sqlite3
+    database: db/test.sqlite3
+EOS