diff --git a/.github/workflows/enos-fmt.yml b/.github/workflows/enos-fmt.yml
index ac5149d737..8c2c6a88c3 100644
--- a/.github/workflows/enos-fmt.yml
+++ b/.github/workflows/enos-fmt.yml
@@ -22,6 +22,7 @@ jobs:
       - uses: hashicorp/setup-terraform@633666f66e0061ca3b725c73b2ec20cd13a8fdd1    # TSCCR: loading action configs: failed to query HEAD reference: failed to get advertised references: authorization failed
         with:
           terraform_wrapper: false
+          terraform_version: 1.5.7 # QT-623: pin to terraform 1.5.x until a tfjson bug is resolved
       - uses: hashicorp/action-setup-enos@v1    # TSCCR: loading action configs: failed to query HEAD reference: failed to get advertised references: authorization failed
         with:
           github-token: ${{ secrets.SERVICE_USER_GITHUB_TOKEN }}
diff --git a/.github/workflows/enos-run.yml b/.github/workflows/enos-run.yml
index fb8af7b7dc..bdb0e24e4e 100644
--- a/.github/workflows/enos-run.yml
+++ b/.github/workflows/enos-run.yml
@@ -125,6 +125,7 @@ jobs:
           # the terraform wrapper will break Terraform execution in enos because
           # it changes the output to text when we expect it to be JSON.
           terraform_wrapper: false
+          terraform_version: 1.5.7 # QT-623: pin to terraform 1.5.x until a tfjson bug is resolved
       - name: Import GPG key for Boundary pass keystore
         id: import_gpg
         uses: crazy-max/ghaction-import-gpg@72b6676b71ab476b77e676928516f6982eef7a41 # v5.3.0