diff --git a/handwritten/bigquery/test/bigquery.ts b/handwritten/bigquery/test/bigquery.ts
index f410273c564..e3a134e85f1 100644
--- a/handwritten/bigquery/test/bigquery.ts
+++ b/handwritten/bigquery/test/bigquery.ts
@@ -3411,85 +3411,6 @@ describe('BigQuery', () => {
         expected?: any;
         bail?: boolean;
       }[] = [
-        {
-          name: 'TOF: TIMESTAMP_OUTPUT_FORMAT_UNSPECIFIED, UI64: true',
-          opts: {
-            ['formatOptions.timestampOutputFormat']:
-              'TIMESTAMP_OUTPUT_FORMAT_UNSPECIFIED',
-            ['formatOptions.useInt64Timestamp']: true,
-          },
-          expected: {
-            timestampOutputFormat: 'TIMESTAMP_OUTPUT_FORMAT_UNSPECIFIED',
-            useInt64Timestamp: true,
-          },
-        },
-        {
-          name: 'TOF: TIMESTAMP_OUTPUT_FORMAT_UNSPECIFIED, UI64: false (default ISO8601_STRING)',
-          opts: {
-            ['formatOptions.timestampOutputFormat']:
-              'TIMESTAMP_OUTPUT_FORMAT_UNSPECIFIED',
-            ['formatOptions.useInt64Timestamp']: false,
-          },
-          expected: {
-            timestampOutputFormat: 'TIMESTAMP_OUTPUT_FORMAT_UNSPECIFIED',
-            useInt64Timestamp: false,
-          },
-        },
-        {
-          name: 'TOF: FLOAT64, UI64: false',
-          opts: {
-            ['formatOptions.timestampOutputFormat']: 'FLOAT64',
-            ['formatOptions.useInt64Timestamp']: false,
-          },
-          expected: {
-            timestampOutputFormat: 'FLOAT64',
-            useInt64Timestamp: false,
-          },
-        },
-        {
-          name: 'TOF: INT64, UI64: true',
-          opts: {
-            ['formatOptions.timestampOutputFormat']: 'INT64',
-            ['formatOptions.useInt64Timestamp']: true,
-          },
-          expected: {
-            timestampOutputFormat: 'INT64',
-            useInt64Timestamp: true,
-          },
-        },
-        {
-          name: 'TOF: INT64, UI64: false',
-          opts: {
-            ['formatOptions.timestampOutputFormat']: 'INT64',
-            ['formatOptions.useInt64Timestamp']: false,
-          },
-          expected: {
-            timestampOutputFormat: 'INT64',
-            useInt64Timestamp: false,
-          },
-        },
-        {
-          name: 'TOF: ISO8601_STRING, UI64: true',
-          opts: {
-            ['formatOptions.timestampOutputFormat']: 'ISO8601_STRING',
-            ['formatOptions.useInt64Timestamp']: true,
-          },
-          expected: {
-            timestampOutputFormat: 'ISO8601_STRING',
-            useInt64Timestamp: true,
-          },
-        },
-        {
-          name: 'TOF: ISO8601_STRING, UI64: false',
-          opts: {
-            ['formatOptions.timestampOutputFormat']: 'ISO8601_STRING',
-            ['formatOptions.useInt64Timestamp']: false,
-          },
-          expected: {
-            timestampOutputFormat: 'ISO8601_STRING',
-            useInt64Timestamp: false,
-          },
-        },
         {
           name: 'TOF: omitted, UI64: omitted (default ISO8601_STRING)',
           opts: {},
@@ -3515,43 +3436,6 @@ describe('BigQuery', () => {
             useInt64Timestamp: false,
           },
         },
-        {
-          name: 'TOF: TIMESTAMP_OUTPUT_FORMAT_UNSPECIFIED, UI64: omitted (default ISO8601_STRING)',
-          opts: {
-            ['formatOptions.timestampOutputFormat']:
-              'TIMESTAMP_OUTPUT_FORMAT_UNSPECIFIED',
-          },
-          expected: {
-            timestampOutputFormat: 'TIMESTAMP_OUTPUT_FORMAT_UNSPECIFIED',
-          },
-        },
-        {
-          name: 'TOF: FLOAT64, UI64: omitted',
-          opts: {
-            ['formatOptions.timestampOutputFormat']: 'FLOAT64',
-          },
-          expected: {
-            timestampOutputFormat: 'FLOAT64',
-          },
-        },
-        {
-          name: 'TOF: INT64, UI64: omitted',
-          opts: {
-            ['formatOptions.timestampOutputFormat']: 'INT64',
-          },
-          expected: {
-            timestampOutputFormat: 'INT64',
-          },
-        },
-        {
-          name: 'TOF: ISO8601_STRING, UI64: omitted',
-          opts: {
-            ['formatOptions.timestampOutputFormat']: 'ISO8601_STRING',
-          },
-          expected: {
-            timestampOutputFormat: 'ISO8601_STRING',
-          },
-        },
       ];
 
       testCases.forEach(testCase => {