diff --git a/src/server/test/web/readingsBarGroupQuantity.js b/src/server/test/web/readingsBarGroupQuantity.js
index 776443704..d6de2df14 100644
--- a/src/server/test/web/readingsBarGroupQuantity.js
+++ b/src/server/test/web/readingsBarGroupQuantity.js
@@ -82,7 +82,22 @@ mocha.describe('readings API', () => {
                   expectReadingToEqualExpected(res, expected, GROUP_ID);
                 });
 
-                // Add BG5 here
+                mocha.it('BG5: 75 day bars for 15 + 20 minute reading intervals and quantity units with +-inf start/end time & kWh as kWh', async () =>{
+                    //load data into database
+                    await prepareTest(unitDatakWh, conversionDatakWh, meterDatakWhGroups, groupDatakWh);
+                    //get unit ID since the DB could use any value.
+                    const unitId = await getUnitId('kWh');
+                    // 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_kWh_st_-inf_et_inf_bd_75.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: '75',
+                            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
diff --git a/src/server/test/web/readingsData/expected_bar_group_ri_15-20_mu_kWh_gu_kWh_st_-inf_et_inf_bd_75.csv b/src/server/test/web/readingsData/expected_bar_group_ri_15-20_mu_kWh_gu_kWh_st_-inf_et_inf_bd_75.csv
new file mode 100644
index 000000000..aaaa30e37
--- /dev/null
+++ b/src/server/test/web/readingsData/expected_bar_group_ri_15-20_mu_kWh_gu_kWh_st_-inf_et_inf_bd_75.csv
@@ -0,0 +1,2 @@
+reading,start time,end time
+627024.401870568,2022-08-18 00:00:00,2022-11-01 00:00:00