diff --git a/extensions/ql-vscode/test/pure-tests/log-summary-parser.test.ts b/extensions/ql-vscode/test/pure-tests/log-summary-parser.test.ts
index f157120a8..ded2ce9d6 100644
--- a/extensions/ql-vscode/test/pure-tests/log-summary-parser.test.ts
+++ b/extensions/ql-vscode/test/pure-tests/log-summary-parser.test.ts
@@ -8,8 +8,8 @@ import { parseViewerData } from '../../src/pure/log-summary-parser';
 describe('Evaluator log summary tests', async function() {
   describe('for a valid summary text', async function() {
     it('should return only valid EvalLogData objects', async function() {
-      const validSummaryText = await fs.readFile(path.join(__dirname, 'evaluator-log-summaries/valid-summary.jsonl'), 'utf8');
-      const logDataItems = parseViewerData(validSummaryText.toString());
+      const validSummaryPath = path.join(__dirname, 'evaluator-log-summaries/valid-summary.jsonl');
+      const logDataItems = await parseViewerData(validSummaryPath);
       expect(logDataItems).to.not.be.undefined;
       expect(logDataItems.length).to.eq(3);
       for (const item of logDataItems) {
@@ -27,14 +27,14 @@ describe('Evaluator log summary tests', async function() {
     });
 
     it('should not parse a summary header object', async function() {
-      const invalidHeaderText = await fs.readFile(path.join(__dirname, 'evaluator-log-summaries/invalid-header.jsonl'), 'utf8');
-      const logDataItems = parseViewerData(invalidHeaderText);
+      const invalidHeaderPath = path.join(__dirname, 'evaluator-log-summaries/invalid-header.jsonl');
+      const logDataItems = await parseViewerData(invalidHeaderPath);
       expect(logDataItems.length).to.eq(0);
     });
 
     it('should not parse a log event missing RA or millis fields', async function() {
-      const invalidSummaryText = await fs.readFile(path.join(__dirname, 'evaluator-log-summaries/invalid-summary.jsonl'), 'utf8');
-      const logDataItems = parseViewerData(invalidSummaryText);
+      const invalidSummaryPath = path.join(__dirname, 'evaluator-log-summaries/invalid-summary.jsonl');
+      const logDataItems = await parseViewerData(invalidSummaryPath);
       expect(logDataItems.length).to.eq(0);
     });
   });