diff --git a/tox.ini b/tox.ini
index ae8be247..9a67e0b2 100644
--- a/tox.ini
+++ b/tox.ini
@@ -321,22 +321,6 @@ commands =
     dbt deps
     dbt build --target postgres
 
-[testenv:integration_postgres_1_5_0]
-changedir = integration_test_project
-deps = dbt-postgres~=1.5.0
-commands =
-    dbt clean
-    dbt deps
-    dbt build --target postgres
-
-[testenv:integration_postgres_1_6_0]
-changedir = integration_test_project
-deps = dbt-postgres~=1.6.0
-commands =
-    dbt clean
-    dbt deps
-    dbt build --target postgres
-
 [testenv:integration_postgres_1_7_0]
 changedir = integration_test_project
 deps = dbt-postgres~=1.7.0