diff --git a/.github/workflows/__diagnostics-without-db.yml b/.github/workflows/__diagnostics-without-db.yml
index 27200f181..71c597d74 100644
--- a/.github/workflows/__diagnostics-without-db.yml
+++ b/.github/workflows/__diagnostics-without-db.yml
@@ -86,7 +86,7 @@ jobs:
 
       - name: Check diagnostics appear on disk
         env:
-          SARIF_PATH: '${{ runner.temp }}/codeql-action-temp-diagnostics/'
+          DIAGNOSTICS_DIR: '${{ runner.temp }}/codeql-action-temp-diagnostics/'
         run: |
           cd ../action
           npx tsx ./pr-checks/diagnostics-without-db.ts
diff --git a/pr-checks/checks/diagnostics-without-db.yml b/pr-checks/checks/diagnostics-without-db.yml
index f4bdfc451..e346a1cab 100644
--- a/pr-checks/checks/diagnostics-without-db.yml
+++ b/pr-checks/checks/diagnostics-without-db.yml
@@ -38,7 +38,7 @@ steps:
 
   - name: Check diagnostics appear on disk
     env:
-      SARIF_PATH: "${{ runner.temp }}/codeql-action-temp-diagnostics/"
+      DIAGNOSTICS_DIR: "${{ runner.temp }}/codeql-action-temp-diagnostics/"
     run: |
       cd ../action
       npx tsx ./pr-checks/diagnostics-without-db.ts
diff --git a/pr-checks/diagnostics-without-db.ts b/pr-checks/diagnostics-without-db.ts
index b742c10d6..b276260f9 100644
--- a/pr-checks/diagnostics-without-db.ts
+++ b/pr-checks/diagnostics-without-db.ts
@@ -6,20 +6,20 @@ import * as core from "@actions/core";
 import type * as diagnostics from "../src/diagnostics";
 
 const DIAGNOSTIC_ID = "codeql-action/forced-nightly-cli";
-const sarifDirectory = process.env["SARIF_PATH"];
+const diagnosticDirectory = process.env["DIAGNOSTICS_DIR"];
 
-if (sarifDirectory === undefined) {
-  throw new Error("SARIF_PATH is undefined.");
+if (diagnosticDirectory === undefined) {
+  throw new Error("DIAGNOSTICS_DIR is undefined.");
 }
 
 const paths = fs
-  .readdirSync(sarifDirectory, {
+  .readdirSync(diagnosticDirectory, {
     recursive: true,
     encoding: "utf-8",
   })
   .filter((p) => p.endsWith(".json"));
 
-core.info(`Found ${paths.length} paths in '${sarifDirectory}'.`);
+core.info(`Found ${paths.length} paths in '${diagnosticDirectory}'.`);
 core.info(`Searching for a diagnostic with id '${DIAGNOSTIC_ID}'...`);
 
 let found = false;
@@ -31,7 +31,7 @@ for (const diagnosticPath of paths) {
   core.info(`Found ${diagnosticPath}.`);
 
   const contents = JSON.parse(
-    fs.readFileSync(path.resolve(sarifDirectory, diagnosticPath), "utf-8"),
+    fs.readFileSync(path.resolve(diagnosticDirectory, diagnosticPath), "utf-8"),
   ) as diagnostics.DiagnosticMessage;
 
   if (contents.source.id === DIAGNOSTIC_ID) {