try this

Author: pawelangelow

redisinsight/api/package.json

@@ -34,7 +34,7 @@
     "test:debug": "node --inspect-brk -r tsconfig-paths/register -r ts-node/register node_modules/.bin/jest --runInBand -w 1",
     "test:e2e": "jest --config ./test/jest-e2e.json -w 1",
     "typeorm": "ts-node -r tsconfig-paths/register ./node_modules/typeorm/cli.js -d ./config/ormconfig.ts",
-    "test:api": "cross-env NODE_ENV=test ts-mocha --paths --config ./test/api/.mocharc.yml",
+    "test:api": "cross-env NODE_ENV=test ts-mocha --paths --config ./test/api/.mocharc.cjs",
     "test:api:cov": "nyc --reporter=html --reporter=text --reporter=text-summary yarn run test:api",
     "test:api:ci:cov": "cross-env nyc -r text -r text-summary -r html yarn run test:api --reporter mocha-multi-reporters --reporter-options configFile=test/api/reporters.json && nyc merge .nyc_output ./coverage/test-run-coverage.json",
     "typeorm:migrate": "cross-env NODE_ENV=staging yarn typeorm migration:generate ./migration/migration",

redisinsight/api/test/api/.mocharc.cjs

@@ -0,0 +1,29 @@
+// Mocha config. Dynamic so the spec list can react to TEST_TAGS.
+//
+// When TEST_TAGS is set on an RTE (e.g. oss-st-8 sets TEST_TAGS=array
+// because redis:8.8-alpine lacks modules and other suites fail against
+// Redis 8.8 semantics — per-field hash TTL, RediSearch flag changes,
+// etc.), mocha only loads the file globs that map to the requested tag(s).
+// When TEST_TAGS is unset (every other RTE) the wildcard runs everything,
+// preserving prior behaviour exactly.
+const TAG_SPECS = {
+  array: ['test/api/array/**/*.test.ts'],
+};
+
+const tags = (process.env.TEST_TAGS || '')
+  .split(',')
+  .map((s) => s.trim())
+  .filter(Boolean);
+
+const spec = tags.length
+  ? [...new Set(tags.flatMap((t) => TAG_SPECS[t] || []))]
+  : ['test/**/*.test.ts'];
+
+module.exports = {
+  spec,
+  require: 'test/api/api.deps.init.ts',
+  project: './test/api/api.tsconfig.json',
+  retries: 2,
+  timeout: 60000,
+  exit: true,
+};