diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ea0748e9..06f7f86b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,15 +13,16 @@ jobs:
       matrix:
         java: [8, 11]
         scala: [2.11.12, 2.12.13, 2.13.5]
-        postgres: [11, 12, 13, 14]
+        postgres: [11]
     name: Test (Postgres ${{ matrix.postgres }} Scala ${{ matrix.scala }} Java ${{ matrix.java }})
     runs-on: ubuntu-latest
+    env:
+      SLICK_PG_TEST_POSTGRES_IMAGE_TAG: ${{ matrix.postgres }}
     steps:
       - uses: actions/checkout@v2
       - uses: coursier/cache-action@v5
       - uses: actions/setup-node@v2
       - uses: olafurpg/setup-scala@v10
         with:
-          distribution: temurin
           java-version: ${{ matrix.java }}
-      - run: sbt -DSLICK_PG_TEST_POSTGRES_IMAGE_TAG=${{ matrix.postgres }} ++${{ matrix.scala }} test
\ No newline at end of file
+      - run: sbt ++${{ matrix.scala }} test
\ No newline at end of file
diff --git a/README.md b/README.md
index c5c6c70b..0e8a2fc2 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@ Slick-pg
 - Pg_trgm
 
 
-** _Tested on `PostgreSQL 11/12/13/14` with `Slick 3.3.3`._
+** _Tested on `PostgreSQL 11` with `Slick 3.3.3`._
 ** _`Java 8`+ is required._
 
 
diff --git a/core/src/test/scala/com/github/tminglei/slickpg/PostgresContainer.scala b/core/src/test/scala/com/github/tminglei/slickpg/PostgresContainer.scala
index 4d5b046a..81138071 100644
--- a/core/src/test/scala/com/github/tminglei/slickpg/PostgresContainer.scala
+++ b/core/src/test/scala/com/github/tminglei/slickpg/PostgresContainer.scala
@@ -13,7 +13,7 @@ trait PostgresContainer extends ForAllTestContainer { self: Suite =>
     sys.env
       .get(variable)
       .orElse(sys.props.get(variable))
-      .getOrElse("latest")
+      .getOrElse("11")
   }
   
   override val container: PostgreSQLContainer = PostgreSQLContainer(