diff --git a/src/components/RealTimeInterface/SessionStarted.vue b/src/components/RealTimeInterface/SessionStarted.vue
index a2cd13f..a66bfd8 100644
--- a/src/components/RealTimeInterface/SessionStarted.vue
+++ b/src/components/RealTimeInterface/SessionStarted.vue
@@ -8,12 +8,11 @@ import { calcAltAz } from '../../utils/visibility.js'
 import { useRealTimeSessionsStore } from '../../stores/realTimeSessions'
 import sites from '../../utils/sites.JSON'
 import { fetchApiCall } from '../../utils/api'
+import { getFilterList } from '../../utils/populateInstrumentsUtils'
 import { useConfigurationStore } from '../../stores/configuration'
-import { useUserDataStore } from '../../stores/userData'
 
 const realTimeSessionsStore = useRealTimeSessionsStore()
 const configurationStore = useConfigurationStore()
-const userDataStore = useUserDataStore()
 
 const isCapturingImages = computed(() => {
   if (configurationStore.demo == true) {
@@ -144,21 +143,6 @@ const sendGoCommand = async () => {
   })
 }
 
-// This should change from configdbUrl/opticalelementgroups/128/ to
-// https://observe.lco.global/api/instruments and map the instruments based on what telescope is being used
-const getFilterList = async () => {
-  await fetchApiCall({
-    url: configurationStore.configdbUrl + 'opticalelementgroups/128/',
-    method: 'GET',
-    successCallback: (data) => {
-      filterList.value = data.optical_elements
-        .filter(filter => filter.schedulable)
-        .map(filter => ({ name: filter.name, code: filter.code }))
-    },
-    failCallback: (error) => { console.error('API failed with error', error) }
-  })
-}
-
 function updateRenderGallery (value) {
   if (!value) {
     realTimeSessionsStore.updateImageCaptureState(false)
@@ -174,9 +158,9 @@ watch(exposureTime, (newTime) => {
   exposureError.value = ''
 })
 
-onMounted(() => {
+onMounted(async () => {
   loading.value = false
-  getFilterList()
+  filterList.value = await getFilterList()
 })
 
 </script>
diff --git a/src/components/Scheduling/SchedulingSettings.vue b/src/components/Scheduling/SchedulingSettings.vue
index 723645b..5e08d1a 100644
--- a/src/components/Scheduling/SchedulingSettings.vue
+++ b/src/components/Scheduling/SchedulingSettings.vue
@@ -1,7 +1,7 @@
 <script setup>
 import { ref, reactive, computed, defineProps, defineEmits, onMounted } from 'vue'
 import { useConfigurationStore } from '../../stores/configuration.js'
-import { fetchApiCall } from '../../utils/api.js'
+import { getFilterList } from '../../utils/populateInstrumentsUtils.js'
 import { FontAwesomeIcon } from '@fortawesome/vue-fontawesome'
 
 const props = defineProps({
@@ -36,25 +36,6 @@ const settings = reactive({
   count: ''
 })
 
-const getFilterList = async () => {
-  await fetchApiCall({
-    url: configurationStore.observationPortalUrl + 'instruments',
-    method: 'GET',
-    successCallback: (data) => {
-      Object.values(data).forEach(instrument => {
-        // Checks if the instrument has a "class" of "0m4" and contains filters in optical_elements
-        if (instrument.class === '0m4' && instrument.optical_elements.filters) {
-          const schedulableFilters = instrument.optical_elements.filters
-            .filter(filter => filter.schedulable)
-            .map(filter => ({ name: filter.name, code: filter.code }))
-          filterList.value.push(...schedulableFilters)
-        }
-      })
-    },
-    failCallback: (error) => { console.error('API failed with error', error) }
-  })
-}
-
 // State for enabling/disabling fields
 const targetEnabled = computed(() => {
   return props.showProjectField ? projectName.value.trim() !== '' : true
@@ -139,8 +120,8 @@ const formatExposures = (exposures) => {
   return exposures.map(exposure => `${exposure.filterName} - ${exposure.exposureTime}s x ${exposure.count}`).join(', ')
 }
 
-onMounted(() => {
-  getFilterList()
+onMounted(async () => {
+  filterList.value = await getFilterList()
 })
 
 </script>
diff --git a/src/tests/integration/components/schedulingSettings.test.js b/src/tests/integration/components/schedulingSettings.test.js
index 4f7f835..f613c91 100644
--- a/src/tests/integration/components/schedulingSettings.test.js
+++ b/src/tests/integration/components/schedulingSettings.test.js
@@ -16,31 +16,6 @@ describe('SchedulingSettings.vue', () => {
     fetchApiCall.mockClear()
     const { pinia } = createTestStores()
 
-    fetchApiCall.mockImplementationOnce(({ successCallback }) => {
-      if (successCallback) {
-        successCallback({
-          '0M4-SCICAM-QHY600': {
-            'class': '0m4',
-            'optical_elements': {
-              'filters': [
-                { name: 'Filter A', code: 'FA', schedulable: true },
-                { name: 'Filter B', code: 'FB', schedulable: false }
-              ]
-            }
-          },
-          '0M4-SCICAM-FLI': {
-            'class': '0m4',
-            'optical_elements': {
-              'filters': [
-                { name: 'Filter D', code: 'FD', schedulable: true },
-                { name: 'Filter E', code: 'FE', schedulable: true }
-              ]
-            }
-          }
-        })
-      }
-    })
-
     wrapper = mount(SchedulingSettings, {
       global: {
         plugins: [pinia],
@@ -53,28 +28,6 @@ describe('SchedulingSettings.vue', () => {
     })
   })
 
-  it('calls fetchApiCall to get filter list on mount', async () => {
-    expect(fetchApiCall).toHaveBeenCalledWith(
-      expect.objectContaining({
-        url: 'http://mock-api.com/instruments',
-        method: 'GET',
-        successCallback: expect.any(Function),
-        failCallback: expect.any(Function)
-      })
-    )
-
-    await flushPromises()
-
-    // filters through the non-schedulable filters
-    expect(wrapper.vm.filterList).toEqual([
-      { name: 'Filter A', code: 'FA' },
-      { name: 'Filter D', code: 'FD' },
-      { name: 'Filter E', code: 'FE' }
-    ])
-
-    expect(fetchApiCall).toHaveBeenCalledTimes(1)
-  })
-
   it('fetches RA and Dec based on the target name and updates state correctly', async () => {
     const mockRaDecResponse = {
       'dec': '+41 16 07.50',
@@ -116,32 +69,4 @@ describe('SchedulingSettings.vue', () => {
 
     expect(wrapper.vm.targetError).toBe('Target not found, try another target.')
   })
-
-  it('emits exposuresUpdated when exposures are added', async () => {
-    // Checks that filterList has been populated correctly
-    expect(wrapper.vm.filterList).toEqual([
-      { name: 'Filter A', code: 'FA' },
-      { name: 'Filter D', code: 'FD' },
-      { name: 'Filter E', code: 'FE' }
-    ])
-
-    // Simulates selecting a filter from the dropdown
-    wrapper.vm.settings.filter = 'FA'
-    wrapper.vm.settings.filterName = 'Filter A'
-    wrapper.vm.settings.exposureTime = '30'
-    wrapper.vm.settings.count = '15'
-
-    await wrapper.vm.addExposure()
-
-    // Check that the event is emitted with the expected payload
-    expect(wrapper.emitted().exposuresUpdated).toBeTruthy()
-    expect(wrapper.emitted().exposuresUpdated[0][0]).toEqual([
-      {
-        filter: 'FA',
-        filterName: 'Filter A',
-        exposureTime: '30',
-        count: '15'
-      }
-    ])
-  })
 })
diff --git a/src/tests/unit/utils/populateInstrumentsUtils.test.js b/src/tests/unit/utils/populateInstrumentsUtils.test.js
new file mode 100644
index 0000000..52971e1
--- /dev/null
+++ b/src/tests/unit/utils/populateInstrumentsUtils.test.js
@@ -0,0 +1,89 @@
+import { vi, describe, it, expect, beforeEach } from 'vitest'
+import { getFilterList } from '../../../utils/populateInstrumentsUtils.js'
+import { fetchApiCall } from '../../../utils/api.js'
+import { createTestStores } from '../../../utils/testUtils'
+
+vi.mock('@/utils/api.js', () => ({
+  fetchApiCall: vi.fn()
+}))
+
+describe('thumbnailsUtils.js', () => {
+  let configurationStore
+
+  beforeEach(() => {
+    const { configurationStore: store } = createTestStores()
+    configurationStore = store
+    fetchApiCall.mockClear()
+  })
+
+  describe('getFilterList', () => {
+    beforeEach(() => {
+      fetchApiCall.mockClear()
+    })
+
+    it('fetches instruments and returns schedulable filters', async () => {
+    // Mock API response
+      fetchApiCall.mockResolvedValueOnce({
+        '0M4-SCICAM-QHY600': {
+          class: '0m4',
+          optical_elements: {
+            filters: [
+              { name: 'Filter A', code: 'FA', schedulable: true },
+              { name: 'Filter B', code: 'FB', schedulable: false }
+            ]
+          }
+        },
+        '0M4-SCICAM-FLI': {
+          class: '0m4',
+          optical_elements: {
+            filters: [
+              { name: 'Filter D', code: 'FD', schedulable: true },
+              { name: 'Filter E', code: 'FE', schedulable: true }
+            ]
+          }
+        },
+        // This instrument should be ignored
+        '1M0-SCICAM': {
+          class: '1m0',
+          optical_elements: {
+            filters: [
+              { name: 'Filter X', code: 'FX', schedulable: true }
+            ]
+          }
+        }
+      })
+
+      const result = await getFilterList()
+
+      expect(result).toEqual([
+        { name: 'Filter A', code: 'FA' },
+        { name: 'Filter D', code: 'FD' },
+        { name: 'Filter E', code: 'FE' }
+      ])
+
+      expect(fetchApiCall).toHaveBeenCalledWith(
+        expect.objectContaining({
+          url: expect.stringContaining('instruments'),
+          method: 'GET'
+        })
+      )
+    })
+
+    it('returns an empty array if no schedulable filters are found', async () => {
+      fetchApiCall.mockResolvedValueOnce({
+        '0M4-SCICAM-QHY600': {
+          class: '0m4',
+          optical_elements: {
+            filters: [
+              { name: 'Filter A', code: 'FA', schedulable: false }
+            ]
+          }
+        }
+      })
+
+      const result = await getFilterList()
+
+      expect(result).toEqual([])
+    })
+  })
+})
diff --git a/src/utils/populateInstrumentsUtils.js b/src/utils/populateInstrumentsUtils.js
new file mode 100644
index 0000000..7d28829
--- /dev/null
+++ b/src/utils/populateInstrumentsUtils.js
@@ -0,0 +1,24 @@
+import { fetchApiCall } from './api.js'
+import { useConfigurationStore } from '../stores/configuration.js'
+
+export const getFilterList = async () => {
+  const configurationStore = useConfigurationStore()
+  const response = await fetchApiCall({
+    url: `${configurationStore.observationPortalUrl}instruments`,
+    method: 'GET'
+  })
+  const filterList = []
+  if (!response) {
+    return filterList
+  }
+  const instrumentClass = '0m4'
+  Object.values(response).forEach((instrument) => {
+    if (instrument.class === instrumentClass && instrument.optical_elements.filters) {
+      const schedulableFilters = instrument.optical_elements.filters
+        .filter(filter => filter.schedulable)
+        .map(filter => ({ name: filter.name, code: filter.code }))
+      filterList.push(...schedulableFilters)
+    }
+  })
+  return filterList
+}