diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 54fb60b05b..9f13395254 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -119,7 +119,7 @@ jobs:
 
     runs-on: ubuntu-20.04
     container:
-      image: ghcr.io/newrelic/newrelic-python-agent-ci:latest
+      image: ghcr.io/newrelic/newrelic-python-agent-ci:sha-2392bb66124c37a9598b24000a9d6c430ee7732e@sha256:b28ffe21ce0499230be39a631d1d6463db027108ea74db571a23f4f57aa747be
       options: >-
         --add-host=host.docker.internal:host-gateway
     timeout-minutes: 30
@@ -164,7 +164,7 @@ jobs:
 
     runs-on: ubuntu-20.04
     container:
-      image: ghcr.io/newrelic/newrelic-python-agent-ci:latest
+      image: ghcr.io/newrelic/newrelic-python-agent-ci:sha-2392bb66124c37a9598b24000a9d6c430ee7732e@sha256:b28ffe21ce0499230be39a631d1d6463db027108ea74db571a23f4f57aa747be
       options: >-
         --add-host=host.docker.internal:host-gateway
     timeout-minutes: 30
@@ -209,7 +209,7 @@ jobs:
 
     runs-on: ubuntu-20.04
     container:
-      image: ghcr.io/newrelic/newrelic-python-agent-ci:latest
+      image: ghcr.io/newrelic/newrelic-python-agent-ci:sha-2392bb66124c37a9598b24000a9d6c430ee7732e@sha256:b28ffe21ce0499230be39a631d1d6463db027108ea74db571a23f4f57aa747be
       options: >-
         --add-host=host.docker.internal:host-gateway
     timeout-minutes: 30
@@ -269,7 +269,7 @@ jobs:
 
     runs-on: ubuntu-20.04
     container:
-      image: ghcr.io/newrelic/newrelic-python-agent-ci:latest
+      image: ghcr.io/newrelic/newrelic-python-agent-ci:sha-2392bb66124c37a9598b24000a9d6c430ee7732e@sha256:b28ffe21ce0499230be39a631d1d6463db027108ea74db571a23f4f57aa747be
       options: >-
         --add-host=host.docker.internal:host-gateway
     timeout-minutes: 30
@@ -332,7 +332,7 @@ jobs:
 
     runs-on: ubuntu-20.04
     container:
-      image: ghcr.io/newrelic/newrelic-python-agent-ci:latest
+      image: ghcr.io/newrelic/newrelic-python-agent-ci:sha-2392bb66124c37a9598b24000a9d6c430ee7732e@sha256:b28ffe21ce0499230be39a631d1d6463db027108ea74db571a23f4f57aa747be
       options: >-
         --add-host=host.docker.internal:host-gateway
     timeout-minutes: 30
@@ -395,7 +395,7 @@ jobs:
 
     runs-on: ubuntu-20.04
     container:
-      image: ghcr.io/newrelic/newrelic-python-agent-ci:latest
+      image: ghcr.io/newrelic/newrelic-python-agent-ci:sha-2392bb66124c37a9598b24000a9d6c430ee7732e@sha256:b28ffe21ce0499230be39a631d1d6463db027108ea74db571a23f4f57aa747be
       options: >-
         --add-host=host.docker.internal:host-gateway
     timeout-minutes: 30
@@ -453,7 +453,7 @@ jobs:
 
     runs-on: ubuntu-20.04
     container:
-      image: ghcr.io/newrelic/newrelic-python-agent-ci:latest
+      image: ghcr.io/newrelic/newrelic-python-agent-ci:sha-2392bb66124c37a9598b24000a9d6c430ee7732e@sha256:b28ffe21ce0499230be39a631d1d6463db027108ea74db571a23f4f57aa747be
       options: >-
         --add-host=host.docker.internal:host-gateway
     timeout-minutes: 30
@@ -513,7 +513,7 @@ jobs:
 
     runs-on: ubuntu-20.04
     container:
-      image: ghcr.io/newrelic/newrelic-python-agent-ci:latest
+      image: ghcr.io/newrelic/newrelic-python-agent-ci:sha-2392bb66124c37a9598b24000a9d6c430ee7732e@sha256:b28ffe21ce0499230be39a631d1d6463db027108ea74db571a23f4f57aa747be
       options: >-
         --add-host=host.docker.internal:host-gateway
     timeout-minutes: 30
@@ -571,7 +571,7 @@ jobs:
 
     runs-on: ubuntu-20.04
     container:
-      image: ghcr.io/newrelic/newrelic-python-agent-ci:latest
+      image: ghcr.io/newrelic/newrelic-python-agent-ci:sha-2392bb66124c37a9598b24000a9d6c430ee7732e@sha256:b28ffe21ce0499230be39a631d1d6463db027108ea74db571a23f4f57aa747be
       options: >-
         --add-host=host.docker.internal:host-gateway
     timeout-minutes: 30
@@ -630,7 +630,7 @@ jobs:
 
     runs-on: ubuntu-20.04
     container:
-      image: ghcr.io/newrelic/newrelic-python-agent-ci:latest
+      image: ghcr.io/newrelic/newrelic-python-agent-ci:sha-2392bb66124c37a9598b24000a9d6c430ee7732e@sha256:b28ffe21ce0499230be39a631d1d6463db027108ea74db571a23f4f57aa747be
       options: >-
         --add-host=host.docker.internal:host-gateway
     timeout-minutes: 30
@@ -700,7 +700,7 @@ jobs:
 
     runs-on: ubuntu-20.04
     container:
-      image: ghcr.io/newrelic/newrelic-python-agent-ci:latest
+      image: ghcr.io/newrelic/newrelic-python-agent-ci:sha-2392bb66124c37a9598b24000a9d6c430ee7732e@sha256:b28ffe21ce0499230be39a631d1d6463db027108ea74db571a23f4f57aa747be
       options: >-
         --add-host=host.docker.internal:host-gateway
     timeout-minutes: 30
@@ -758,7 +758,7 @@ jobs:
 
     runs-on: ubuntu-20.04
     container:
-      image: ghcr.io/newrelic/newrelic-python-agent-ci:latest
+      image: ghcr.io/newrelic/newrelic-python-agent-ci:sha-2392bb66124c37a9598b24000a9d6c430ee7732e@sha256:b28ffe21ce0499230be39a631d1d6463db027108ea74db571a23f4f57aa747be
       options: >-
         --add-host=host.docker.internal:host-gateway
     timeout-minutes: 30
@@ -818,7 +818,7 @@ jobs:
 
     runs-on: ubuntu-20.04
     container:
-      image: ghcr.io/newrelic/newrelic-python-agent-ci:latest
+      image: ghcr.io/newrelic/newrelic-python-agent-ci:sha-2392bb66124c37a9598b24000a9d6c430ee7732e@sha256:b28ffe21ce0499230be39a631d1d6463db027108ea74db571a23f4f57aa747be
       options: >-
         --add-host=host.docker.internal:host-gateway
     timeout-minutes: 30
@@ -879,7 +879,7 @@ jobs:
 
     runs-on: ubuntu-20.04
     container:
-      image: ghcr.io/newrelic/newrelic-python-agent-ci:latest
+      image: ghcr.io/newrelic/newrelic-python-agent-ci:sha-2392bb66124c37a9598b24000a9d6c430ee7732e@sha256:b28ffe21ce0499230be39a631d1d6463db027108ea74db571a23f4f57aa747be
       options: >-
         --add-host=host.docker.internal:host-gateway
     timeout-minutes: 30
@@ -923,4 +923,4 @@ jobs:
         with:
           name: coverage-${{ github.job }}-${{ strategy.job-index }}
           path: ./**/.coverage.*
-          retention-days: 1
\ No newline at end of file
+          retention-days: 1