diff --git a/.github/workflows/integration.yml b/.github/workflows/integration.yml
index ef9cd8b..65d71a3 100644
--- a/.github/workflows/integration.yml
+++ b/.github/workflows/integration.yml
@@ -255,16 +255,27 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: ./.github/actions/install-dependencies
+
       - id: base-url-default
-        name: Default base-url not set
+        name: API URL with base-url not set
         uses: ./
         with:
           script: |
             const endpoint = github.request.endpoint
             return endpoint({}).url
           result-encoding: string
+
+      - id: base-url-default-graphql
+        name: GraphQL URL with base-url not set
+        uses: ./
+        with:
+          script: |
+            const endpoint = github.request.endpoint
+            return endpoint({url: "/graphql"}).url
+          result-encoding: string
+
       - id: base-url-set
-        name: base-url set
+        name: API URL with base-url set
         uses: ./
         with:
           base-url: https://my.github-enterprise-server.com/api/v3
@@ -272,8 +283,19 @@ jobs:
             const endpoint = github.request.endpoint
             return endpoint({}).url
           result-encoding: string
+
+      - id: base-url-set-graphql
+        name: GraphQL URL with base-url set
+        uses: ./
+        with:
+          base-url: https://my.github-enterprise-server.com/api/v3
+          script: |
+            const endpoint = github.request.endpoint
+            return endpoint({url: "/graphql"}).url
+          result-encoding: string
+
       - id: base-url-env
-        name: base-url does not override GITHUB_API_URL when not set
+        name: base-url does not override API URL when not set
         uses: ./
         env:
           GITHUB_API_URL: https://my.github-enterprise-server.com/api/v3
@@ -282,22 +304,63 @@ jobs:
             const endpoint = github.request.endpoint
             return endpoint({}).url
           result-encoding: string
+
+      - id: base-url-env-graphql
+        name: base-url does not override GraphQL URL when not set
+        uses: ./
+        env:
+          GITHUB_API_URL: https://my.github-enterprise-server.com/api/v3
+        with:
+          script: |
+            const endpoint = github.request.endpoint
+            return endpoint({url: "/graphql"}).url
+          result-encoding: string
+
       - run: |
-          echo "- Validating base-url default"
+          echo "- Validating API URL default"
           expected="https://api.github.com/"
-          if [[ "${{steps.base-url-default.outputs.result}}" != "$expected" ]]; then
-            echo $'::error::\u274C' "Expected base-url to equal '$expected', got ${{steps.base-url-default.outputs.result}}"
+          actual="${{steps.base-url-default.outputs.result}}"
+          if [[ "$expected" != "$actual" ]]; then
+            echo $'::error::\u274C' "Expected base-url to equal '$expected', got $actual"
             exit 1
           fi
+
+          echo "- Validating GraphQL URL default"
+          expected="https://api.github.com/graphql"
+          actual="${{steps.base-url-default-graphql.outputs.result}}"
+          if [[ "$expected" != "$actual" ]]; then
+            echo $'::error::\u274C' "Expected base-url to equal '$expected', got $actual"
+            exit 1
+          fi
+
           echo "- Validating base-url set to a value"
           expected="https://my.github-enterprise-server.com/api/v3/"
-          if [[ "${{steps.base-url-set.outputs.result}}" != "$expected" ]]; then
-            echo $'::error::\u274C' "Expected base-url to equal '$expected', got ${{steps.base-url-set.outputs.result}}"
+          actual="${{steps.base-url-set.outputs.result}}"
+          if [[ "$expected" != "$actual" ]]; then
+            echo $'::error::\u274C' "Expected base-url to equal '$expected', got $actual"
             exit 1
           fi
-          echo "- Validating base-url not set respects GITHUB_API_URL"
+
+          echo "- Validating GraphQL URL with base-url set to a value"
+          expected="https://my.github-enterprise-server.com/api/v3/graphql"
+          actual="${{steps.base-url-set-graphql.outputs.result}}"
+          if [[ "$expected" != "$actual" ]]; then
+            echo $'::error::\u274C' "Expected base-url to equal '$expected', got $actual"
+            exit 1
+          fi
+
+          echo "- Validating API URL with base-url not set respects GITHUB_API_URL"
           expected="https://my.github-enterprise-server.com/api/v3/"
-          if [[ "${{steps.base-url-env.outputs.result}}" != "$expected" ]]; then
-            echo $'::error::\u274C' "Expected base-url to equal '$expected', got ${{steps.base-url-env.outputs.result}}"
+          actual="${{steps.base-url-env.outputs.result}}"
+          if [[ "$expected" != "$actual" ]]; then
+            echo $'::error::\u274C' "Expected base-url to equal '$expected', got $actual"
+            exit 1
+          fi
+
+          echo "- Validating GraphQL URL with base-url not set respects GITHUB_API_URL"
+          expected="https://my.github-enterprise-server.com/api/v3/graphql"
+          actual="${{steps.base-url-env-graphql.outputs.result}}"
+          if [[ "$expected" != "$actual" ]]; then
+            echo $'::error::\u274C' "Expected base-url to equal '$expected', got $actual"
             exit 1
           fi