diff --git a/tox.ini b/tox.ini
index e49c1ebe..6eaf7fc8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,7 +3,7 @@ skipsdist = True
 envlist = lint_all, testenv
 # this needs to be defined on a single line.  tox has problems with multiline lists
 # This list determined which adapters will be run by dbt centralized testing
-supported_adapters = postgres, snowflake, redshift, bigquery
+supported_adapters = postgres,snowflake,redshift,bigquery
 
 [testenv]
 passenv =