diff --git a/docker-compose.adminer.yaml b/docker-compose.adminer.yaml
index 00441fe..8628d36 100644
--- a/docker-compose.adminer.yaml
+++ b/docker-compose.adminer.yaml
@@ -27,11 +27,20 @@ services:
       - source: ddev-adminer.php
         target: /var/www/html/ddev-adminer.php
         mode: "0444"
+      - source: entrypoint.sh
+        target: /usr/local/bin/entrypoint.sh
+        mode: "0755"
 
 configs:
   ddev-adminer.php:
     content: |
       <?php
+        // Let static files be served directly
+        $$uri = parse_url($$_SERVER['REQUEST_URI'], PHP_URL_PATH);
+        if (is_file('/var/www/html' . $$uri)) {
+          return false;
+        }
+
         if (!count($$_GET)) {
           if ($$_ENV['ADMINER_DEFAULT_DRIVER'] === 'mysql') {
             $$_ENV['ADMINER_DEFAULT_DRIVER'] = 'server';
@@ -48,3 +57,27 @@ configs:
         }
         include './index.php';
       ?>
+
+  entrypoint.sh:
+    content: |
+      #!/bin/sh
+      set -e
+      if [ -n "$$ADMINER_DESIGN" ]; then
+        # Only create link on initial start, to ensure that explicit changes to
+        # adminer.css after the container was started once are preserved.
+        if [ ! -e .adminer-init ]; then
+          for css_file in adminer.css adminer-dark.css; do
+            if [ -f "designs/$$ADMINER_DESIGN/$$css_file" ]; then
+              ln -sf "designs/$$ADMINER_DESIGN/$$css_file" adminer.css
+              break
+            fi
+          done
+        fi
+      fi
+      number=1
+      for PLUGIN in $$ADMINER_PLUGINS; do
+        php plugin-loader.php "$$PLUGIN" > plugins-enabled/$$(printf "%03d" $$number)-$$PLUGIN.php
+        number=$$(($$number+1))
+      done
+      touch .adminer-init || true
+      exec "$$@"
diff --git a/tests/test.bats b/tests/test.bats
index 54f6fd3..812292a 100644
--- a/tests/test.bats
+++ b/tests/test.bats
@@ -36,6 +36,8 @@ setup() {
   assert_success
   run ddev start -y
   assert_success
+
+  export ADMINER_DESIGN=""
 }
 
 health_checks() {
@@ -49,6 +51,20 @@ health_checks() {
   DDEV_DEBUG=true run ddev adminer
   assert_success
   assert_output --partial "FULLURL https://${PROJNAME}.ddev.site:9101"
+
+  if [ "${ADMINER_DESIGN}" != "" ]; then
+    run ddev exec -s adminer 'echo $ADMINER_DESIGN'
+    assert_output "${ADMINER_DESIGN}"
+
+    run curl -sfI https://${PROJNAME}.ddev.site:9101/adminer.css
+    assert_success
+    assert_output --partial "HTTP/2 200"
+    assert_output --partial "content-type: text/css"
+
+    run curl -sf https://${PROJNAME}.ddev.site:9101/adminer.css
+    assert_success
+    assert_output --partial "${ADMINER_DESIGN}"
+  fi
 }
 
 teardown() {
@@ -86,9 +102,12 @@ teardown() {
 
 @test "install from directory with nonstandard port and .env.adminer" {
   set -eu -o pipefail
+
+  export ADMINER_DESIGN=dracula
+
   run ddev config --router-http-port=8080 --router-https-port=8443
   assert_success
-  run ddev dotenv set .ddev/.env.adminer --adminer-design="dracula"
+  run ddev dotenv set .ddev/.env.adminer --adminer-design="${ADMINER_DESIGN}"
   assert_success
   assert_file_exist .ddev/.env.adminer
   echo "# ddev add-on get ${DIR} with project ${PROJNAME} in $(pwd)" >&3
@@ -96,7 +115,5 @@ teardown() {
   assert_success
   run ddev restart -y
   assert_success
-  run ddev exec -s adminer 'echo $ADMINER_DESIGN'
-  assert_output "dracula"
   health_checks
 }