diff --git a/src/server/test/web/readingsBarGroupQuantity.js b/src/server/test/web/readingsBarGroupQuantity.js
index 4cc4f45e7..514a854db 100644
--- a/src/server/test/web/readingsBarGroupQuantity.js
+++ b/src/server/test/web/readingsBarGroupQuantity.js
@@ -27,7 +27,6 @@ mocha.describe('readings API', () => {
     mocha.describe('readings test, test if data returned by API is as expected', () => {
         mocha.describe('for bar charts', () => {
             mocha.describe('for quantity groups', () => {
-
                 mocha.it('BG1: 1 day bars for 15 + 20 minute reading intervals and quantity units with +-inf start/end time & kWh as kWh', async () =>{
                     //loads data into database
                     await prepareTest(unitDatakWh, conversionDatakWh, meterDatakWhGroups, groupDatakWh)
@@ -112,7 +111,7 @@ mocha.describe('readings API', () => {
                             graphicUnitId: unitId });
                     // Check that the API reading is equal to what it is expected to equal
                     expectReadingToEqualExpected(res, expected, GROUP_ID);
-                  });
+                });
 
                 mocha.it('BG6: 76 day bars (no values) for 15 + 20 minute reading intervals and quantity units with +-inf start/end time & kWh as kWh', async () =>{
                     //load data into database
@@ -201,8 +200,68 @@ mocha.describe('readings API', () => {
                     expectReadingToEqualExpected(res, expected, GROUP_ID);
                 });
 
-                // Add BG11 here
-
+                mocha.it('BG11: 1 day bars for 15 + 20 minute reading intervals and quantity units with +-inf start/end time & kWh as BTU reverse conversion', async () => {
+                    //load data into database
+                    const unitData = unitDatakWh.concat([
+                        {
+                            // u3
+                            name: 'MJ',
+                            identifier: 'megaJoules',
+                            unitRepresent: Unit.unitRepresentType.QUANTITY,
+                            secInRate: 3600,
+                            typeOfUnit: Unit.unitType.UNIT,
+                            suffix: '',
+                            displayable: Unit.displayableType.ALL,
+                            preferredDisplay: false,
+                            note: 'MJ'
+                        },
+                        {
+                            // u16
+                            name: 'BTU',
+                            identifier: '',
+                            unitRepresent: Unit.unitRepresentType.QUANTITY,
+                            secInRate: 3600,
+                            typeOfUnit: Unit.unitType.UNIT,
+                            suffix: '',
+                            displayable: Unit.displayableType.ALL,
+                            preferredDisplay: true,
+                            note: 'OED created standard unit'
+                        }
+                    ]);
+                    const conversionData = conversionDatakWh.concat([
+                        {
+                            // c6
+                            sourceName: 'MJ',
+                            destinationName: 'kWh',
+                            bidirectional: true,
+                            slope: 1 / 3.6,
+                            intercept: 0,
+                            note: 'MJ → kWh'
+                        },
+                        {
+                            // c3
+                            sourceName: 'MJ',
+                            destinationName: 'BTU',
+                            bidirectional: true,
+                            slope: 947.8,
+                            intercept: 0,
+                            note: 'MJ → BTU'
+                        }
+                    ]);
+                    await prepareTest(unitData, conversionData, meterDatakWhGroups, groupDatakWh);
+                    //get unit ID since the DB could use any value.
+                    const unitId = await getUnitId('BTU');
+                    //Load the expected response data from the corresponding csv file
+                    const expected = await parseExpectedCsv('src/server/test/web/readingsData/expected_bar_group_ri_15-20_mu_kWh_gu_BTU_st_-inf_et_inf_bd_1.csv');
+                    // Create a request to the API for unbounded reading times and save the response
+                    const res = await chai.request(app).get(`/api/unitReadings/bar/groups/${GROUP_ID}`)
+                        .query({ 
+                            timeInterval: ETERNITY.toString(), 
+                            barWidthDays: '1',
+                            graphicUnitId: unitId });
+                    // Check that the API reading is equal to what it is expected to equal
+                    expectReadingToEqualExpected(res, expected, GROUP_ID);
+                });
                 mocha.it('BG12: 1 day bars for 15 + 20 minute reading intervals and quantity units with +-inf start/end time & kWh as kg of CO2', async () =>{
                     const unitData = unitDatakWh.concat([
                         {
@@ -275,4 +334,3 @@ mocha.describe('readings API', () => {
         });
     });
 });
-