diff --git a/openbook/settings/__init__.py b/openbook/settings/__init__.py
index 55e095982390be3f9bf1b92efe0f09ac128ac9ce..4a7d414d138763d1210724f4bcb51c9bb03131d2 100644
--- a/openbook/settings/__init__.py
+++ b/openbook/settings/__init__.py
@@ -229,36 +229,28 @@ CACHE_BACKENDS = {
 }
 
 
-def redis_cache_backend() -> str:
-    # use for local cache debugging
-    result = CACHE_BACKENDS["redis"]
-    # result = (
-    #    CACHE_BACKENDS["dummy"] if DEBUG and not (IS_PRODUCTION or IS_STAGING or TESTING) else CACHE_BACKENDS["redis"]
-    # )
-    return result
-
-
 CACHES = {
     "default": {
-        "BACKEND": redis_cache_backend(),
+        "BACKEND": CACHE_BACKENDS["redis"],
         "LOCATION": REDIS_DEFAULT_CACHE_LOCATION,
-        "OPTIONS": {"CLIENT_CLASS": "django_redis.client.DefaultClient"},
+        "OPTIONS": {"CLIENT_CLASS": "django_redis.client.DefaultClient",  "REDIS_CLIENT_KWARGS": {"health_check_interval": 30}},
         "KEY_PREFIX": "ob-api-" + ENVIRONMENT_ID + "-",
         "TIMEOUT": 60 * 60,
     },
     USERBLOCK: {
-        "BACKEND": redis_cache_backend(),
+        "BACKEND": CACHE_BACKENDS["redis"],
         "LOCATION": REDIS_USERBLOCK_CACHE_LOCATION,
-        "OPTIONS": {"CLIENT_CLASS": "django_redis.client.DefaultClient"},
+        "OPTIONS": {"CLIENT_CLASS": "django_redis.client.DefaultClient",  "REDIS_CLIENT_KWARGS": {"health_check_interval": 30}},
         "KEY_PREFIX": f"ob-userblock-{ENVIRONMENT_ID}-",
         "TIMEOUT": 60 * 60,  # 1 hour
     },
     UNIFIED_API_RESPONSE_CACHE: {
-        "BACKEND": redis_cache_backend(),
+        "BACKEND": CACHE_BACKENDS["redis"],
         "LOCATION": REDIS_UNIFIED_API_RESPONSE_CACHE_LOCATION,
         "OPTIONS": {
             "CLIENT_CLASS": "django_redis.client.DefaultClient",
             "SERIALIZER": "django_redis.serializers.json.JSONSerializer",
+             "REDIS_CLIENT_KWARGS": {"health_check_interval": 30}
         },
         "KEY_PREFIX": "response-cache",
         "KEY_FUNCTION": "openbook.utils.unified_api_response_cache_key_function",
@@ -266,21 +258,21 @@ CACHES = {
         "TIMEOUT": 60 * 60,
     },
     RQ_DEFAULT_JOBS: {
-        "BACKEND": CACHE_BACKENDS["redis"],  # django_rq needs redis, doesn't work with dummy backend
+        "BACKEND": CACHE_BACKENDS["redis"],
         "LOCATION": REDIS_RQ_DEFAULT_JOBS_CACHE_LOCATION,
-        "OPTIONS": {"CLIENT_CLASS": "django_redis.client.DefaultClient"},
+        "OPTIONS": {"CLIENT_CLASS": "django_redis.client.DefaultClient",  "REDIS_CLIENT_KWARGS": {"health_check_interval": 30}},
         "KEY_PREFIX": "ob-api-rq-default-job-" + ENVIRONMENT_ID + "-",
     },
     RQ_HIGH_JOBS: {
-        "BACKEND": CACHE_BACKENDS["redis"],  # django_rq needs redis, doesn't work with dummy backend
+        "BACKEND": CACHE_BACKENDS["redis"],
         "LOCATION": REDIS_RQ_HIGH_JOBS_CACHE_LOCATION,
-        "OPTIONS": {"CLIENT_CLASS": "django_redis.client.DefaultClient"},
+        "OPTIONS": {"CLIENT_CLASS": "django_redis.client.DefaultClient",  "REDIS_CLIENT_KWARGS": {"health_check_interval": 30}},
         "KEY_PREFIX": "ob-api-rq-high-job-" + ENVIRONMENT_ID + "-",
     },
     RQ_LOW_JOBS: {
-        "BACKEND": CACHE_BACKENDS["redis"],  # django_rq needs redis, doesn't work with dummy backend
+        "BACKEND": CACHE_BACKENDS["redis"],
         "LOCATION": REDIS_RQ_LOW_JOBS_CACHE_LOCATION,
-        "OPTIONS": {"CLIENT_CLASS": "django_redis.client.DefaultClient"},
+        "OPTIONS": {"CLIENT_CLASS": "django_redis.client.DefaultClient",  "REDIS_CLIENT_KWARGS": {"health_check_interval": 30}},
         "KEY_PREFIX": "ob-api-rq-low-job-" + ENVIRONMENT_ID + "-",
     },
 }
diff --git a/terraform/environments/scripts/destroy-env.sh b/terraform/environments/scripts/destroy-env.sh
index d8137694745e9a6bcded13142bf6a5e666b55e6c..aac6dea64eafc13c326e5b4819351c32365e9b3c 100755
--- a/terraform/environments/scripts/destroy-env.sh
+++ b/terraform/environments/scripts/destroy-env.sh
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
 # exit when any command fails
 set -ex
@@ -12,7 +12,7 @@ export TF_LOG=DEBUG
 # * GCP stuff not allowing our resources to be deleted.
 # Most of the time, retrying a destroy fixes these causes.
 retry() {
-  for i in {1..3}; do
+  for i in $(seq 1 3); do
     set +e
     "$@"
     retval=$?