diff --git a/bin/check-test-server b/bin/check-test-server
index 34efa9da..a6fa3495 100755
--- a/bin/check-test-server
+++ b/bin/check-test-server
@@ -10,13 +10,13 @@ function prism_is_running() {
 }
 
 function is_overriding_api_base_url() {
-  [ -n "$API_BASE_URL" ]
+  [ -n "$TEST_API_BASE_URL" ]
 }
 
 if is_overriding_api_base_url ; then
   # If someone is running the tests against the live API, we can trust they know
   # what they're doing and exit early.
-  echo -e "${GREEN}✔ Running tests against ${API_BASE_URL}${NC}"
+  echo -e "${GREEN}✔ Running tests against ${TEST_API_BASE_URL}${NC}"
 
   exit 0
 elif prism_is_running ; then
diff --git a/tests/api_resources/hris/benefits/test_individuals.py b/tests/api_resources/hris/benefits/test_individuals.py
index 62b2028a..15147025 100644
--- a/tests/api_resources/hris/benefits/test_individuals.py
+++ b/tests/api_resources/hris/benefits/test_individuals.py
@@ -16,7 +16,7 @@
     IndividualEnrolledIDsResponse,
 )
 
-base_url = os.environ.get("API_BASE_URL", "http://127.0.0.1:4010")
+base_url = os.environ.get("TEST_API_BASE_URL", "http://127.0.0.1:4010")
 access_token = os.environ.get("API_KEY", "something1234")
 
 
diff --git a/tests/api_resources/hris/test_benefits.py b/tests/api_resources/hris/test_benefits.py
index 5ff71c54..5b378abd 100644
--- a/tests/api_resources/hris/test_benefits.py
+++ b/tests/api_resources/hris/test_benefits.py
@@ -16,7 +16,7 @@
     CreateCompanyBenefitsResponse,
 )
 
-base_url = os.environ.get("API_BASE_URL", "http://127.0.0.1:4010")
+base_url = os.environ.get("TEST_API_BASE_URL", "http://127.0.0.1:4010")
 access_token = os.environ.get("API_KEY", "something1234")
 
 
diff --git a/tests/api_resources/hris/test_company.py b/tests/api_resources/hris/test_company.py
index ee65f80d..4e789441 100644
--- a/tests/api_resources/hris/test_company.py
+++ b/tests/api_resources/hris/test_company.py
@@ -10,7 +10,7 @@
 from tests.utils import assert_matches_type
 from finch.types.hris import Company
 
-base_url = os.environ.get("API_BASE_URL", "http://127.0.0.1:4010")
+base_url = os.environ.get("TEST_API_BASE_URL", "http://127.0.0.1:4010")
 access_token = os.environ.get("API_KEY", "something1234")
 
 
diff --git a/tests/api_resources/hris/test_directory.py b/tests/api_resources/hris/test_directory.py
index baa0898e..d2ff1cd4 100644
--- a/tests/api_resources/hris/test_directory.py
+++ b/tests/api_resources/hris/test_directory.py
@@ -11,7 +11,7 @@
 from finch.pagination import SyncIndividualsPage, AsyncIndividualsPage
 from finch.types.hris import IndividualInDirectory
 
-base_url = os.environ.get("API_BASE_URL", "http://127.0.0.1:4010")
+base_url = os.environ.get("TEST_API_BASE_URL", "http://127.0.0.1:4010")
 access_token = os.environ.get("API_KEY", "something1234")
 
 
diff --git a/tests/api_resources/hris/test_employments.py b/tests/api_resources/hris/test_employments.py
index f88d701c..07e36b69 100644
--- a/tests/api_resources/hris/test_employments.py
+++ b/tests/api_resources/hris/test_employments.py
@@ -11,7 +11,7 @@
 from finch.pagination import SyncResponsesPage, AsyncResponsesPage
 from finch.types.hris import EmploymentDataResponse
 
-base_url = os.environ.get("API_BASE_URL", "http://127.0.0.1:4010")
+base_url = os.environ.get("TEST_API_BASE_URL", "http://127.0.0.1:4010")
 access_token = os.environ.get("API_KEY", "something1234")
 
 
diff --git a/tests/api_resources/hris/test_individuals.py b/tests/api_resources/hris/test_individuals.py
index 98dc39be..2868e86f 100644
--- a/tests/api_resources/hris/test_individuals.py
+++ b/tests/api_resources/hris/test_individuals.py
@@ -11,7 +11,7 @@
 from finch.pagination import SyncResponsesPage, AsyncResponsesPage
 from finch.types.hris import IndividualResponse
 
-base_url = os.environ.get("API_BASE_URL", "http://127.0.0.1:4010")
+base_url = os.environ.get("TEST_API_BASE_URL", "http://127.0.0.1:4010")
 access_token = os.environ.get("API_KEY", "something1234")
 
 
diff --git a/tests/api_resources/hris/test_pay_statements.py b/tests/api_resources/hris/test_pay_statements.py
index 58b0ca54..617ea142 100644
--- a/tests/api_resources/hris/test_pay_statements.py
+++ b/tests/api_resources/hris/test_pay_statements.py
@@ -11,7 +11,7 @@
 from finch.pagination import SyncResponsesPage, AsyncResponsesPage
 from finch.types.hris import PayStatementResponse
 
-base_url = os.environ.get("API_BASE_URL", "http://127.0.0.1:4010")
+base_url = os.environ.get("TEST_API_BASE_URL", "http://127.0.0.1:4010")
 access_token = os.environ.get("API_KEY", "something1234")
 
 
diff --git a/tests/api_resources/hris/test_payments.py b/tests/api_resources/hris/test_payments.py
index fc757620..3c1d61a8 100644
--- a/tests/api_resources/hris/test_payments.py
+++ b/tests/api_resources/hris/test_payments.py
@@ -12,7 +12,7 @@
 from finch.pagination import SyncSinglePage, AsyncSinglePage
 from finch.types.hris import Payment
 
-base_url = os.environ.get("API_BASE_URL", "http://127.0.0.1:4010")
+base_url = os.environ.get("TEST_API_BASE_URL", "http://127.0.0.1:4010")
 access_token = os.environ.get("API_KEY", "something1234")
 
 
diff --git a/tests/api_resources/test_account.py b/tests/api_resources/test_account.py
index 428efc53..c5172b9a 100644
--- a/tests/api_resources/test_account.py
+++ b/tests/api_resources/test_account.py
@@ -10,7 +10,7 @@
 from finch.types import Introspection, DisconnectResponse
 from tests.utils import assert_matches_type
 
-base_url = os.environ.get("API_BASE_URL", "http://127.0.0.1:4010")
+base_url = os.environ.get("TEST_API_BASE_URL", "http://127.0.0.1:4010")
 access_token = os.environ.get("API_KEY", "something1234")
 
 
diff --git a/tests/api_resources/test_providers.py b/tests/api_resources/test_providers.py
index 3cf60a06..47e2dc8b 100644
--- a/tests/api_resources/test_providers.py
+++ b/tests/api_resources/test_providers.py
@@ -11,7 +11,7 @@
 from tests.utils import assert_matches_type
 from finch.pagination import SyncSinglePage, AsyncSinglePage
 
-base_url = os.environ.get("API_BASE_URL", "http://127.0.0.1:4010")
+base_url = os.environ.get("TEST_API_BASE_URL", "http://127.0.0.1:4010")
 access_token = os.environ.get("API_KEY", "something1234")
 
 
diff --git a/tests/api_resources/test_top_level.py b/tests/api_resources/test_top_level.py
index abeff802..daf3c42c 100644
--- a/tests/api_resources/test_top_level.py
+++ b/tests/api_resources/test_top_level.py
@@ -8,7 +8,7 @@
 
 from finch import Finch, AsyncFinch
 
-base_url = os.environ.get("API_BASE_URL", "http://127.0.0.1:4010")
+base_url = os.environ.get("TEST_API_BASE_URL", "http://127.0.0.1:4010")
 access_token = os.environ.get("API_KEY", "something1234")
 
 
diff --git a/tests/api_resources/test_webhooks.py b/tests/api_resources/test_webhooks.py
index 61175521..8d3c87e3 100644
--- a/tests/api_resources/test_webhooks.py
+++ b/tests/api_resources/test_webhooks.py
@@ -12,7 +12,7 @@
 
 from finch import Finch, AsyncFinch
 
-base_url = os.environ.get("API_BASE_URL", "http://127.0.0.1:4010")
+base_url = os.environ.get("TEST_API_BASE_URL", "http://127.0.0.1:4010")
 access_token = os.environ.get("API_KEY", "something1234")
 
 
diff --git a/tests/test_client.py b/tests/test_client.py
index c0c4e46e..520dcf53 100644
--- a/tests/test_client.py
+++ b/tests/test_client.py
@@ -20,7 +20,7 @@
 from finch._exceptions import APIResponseValidationError
 from finch._base_client import BaseClient, make_request_options
 
-base_url = os.environ.get("API_BASE_URL", "http://127.0.0.1:4010")
+base_url = os.environ.get("TEST_API_BASE_URL", "http://127.0.0.1:4010")
 access_token = os.environ.get("API_KEY", "something1234")