diff --git a/cypress/e2e/timeUnit.cy.js b/cypress/e2e/timeUnit.cy.js
index 7d43ac1f..bdf17a3d 100644
--- a/cypress/e2e/timeUnit.cy.js
+++ b/cypress/e2e/timeUnit.cy.js
@@ -40,7 +40,56 @@ describe('Creating a time unit', () => {
     cy.get('[id=write-button]').should('be.disabled')
   })
 
-  it('with incorrect bounds does not work', () => {
+  it('with incorrect, newly created bounds does not work', () => {
+    cy.visit(`/time-unit/new`)
+    cy.get('[id=tu_display_name-textfield]').type('Testing Time Unit Creation')
+    cy.get('[id=sequence-tableselection]').first().click()
+    cy.get('[data-cy=add-button-ALMAAsianlandmammalage]').first().click()
+    cy.get('[id=low_bnd-tableselection]').click()
+    cy.get('[data-cy=add-button-11]').first().click()
+
+    cy.get('[data-cy=add-new-up-bound-form]').click()
+    cy.get('[name=b_name]').type('new upper time bound name')
+    cy.get('[name=b_comment]').type('test comment')
+
+    cy.get('[name=age]').type('one')
+    cy.contains('Save').click()
+    cy.contains('Value must be a valid number')
+
+    cy.get('[name=age]').clear()
+    cy.get('[name=age]').type('-2')
+    cy.contains('Save').click()
+    cy.contains('Value must be a valid number')
+
+    cy.get('[name=age]').clear()
+    cy.get('[name=age]').type('0123')
+    cy.contains('Save').click()
+    cy.contains('Value must be a valid number')
+
+    cy.get('[name=age]').clear()
+    cy.get('[name=age]').type('0,5')
+    cy.contains('Save').click()
+    cy.contains('Value must be a valid number')
+
+    cy.get('[name=age]').clear()
+    cy.get('[name=age]').type('1')
+    cy.contains('Save').click()
+    cy.contains('Value must be a valid number').should('not.exist')
+
+    cy.get('[id=write-button]').should('not.be.disabled')
+
+    cy.get('[data-cy=add-new-low-bound-form]').click()
+    cy.get('[name=b_name]').type('new lower time bound name')
+    cy.get('[name=b_comment]').type('test comment')
+    cy.get('[name=age]').type('0.5')
+    cy.contains('Save').click()
+
+    cy.contains('Upper Bound: Upper bound age has to be lower than lower bound age')
+    cy.contains('Lower Bound: Lower bound age has to be higher than upper bound age')
+    cy.get('[id=write-button]').should('be.disabled')
+  })
+
+  it('with incorrect, existing bounds does not work', () => {
     cy.visit(`/time-unit/new`)
     cy.get('[id=tu_display_name-textfield]').type('Testing Time Unit Creation')
     cy.get('[id=sequence-tableselection]').first().click()
@@ -150,7 +199,45 @@ describe('Editing a time unit', () => {
     cy.contains('ALMAAsianlandmammalage')
   })
 
-  it('with incorrect bounds does not work', () => {
+  it('with incorrect, newly created bounds does not work', () => {
+    cy.visit(`/time-unit/bahean?tab=0`)
+    cy.get('[id=edit-button]').click()
+    cy.contains('7.2') // existing upper bound age
+    cy.contains('11.63') // existing lower bound age
+
+    cy.get('[data-cy=add-new-up-bound-form]').click()
+    cy.get('[name=b_name]').type('new upper time bound name')
+    cy.get('[name=b_comment]').type('test comment')
+    cy.get('[name=age]').type('12')
+    cy.contains('Save').click()
+    cy.contains('Upper Bound: Upper bound age has to be lower than lower bound age')
+    cy.contains('Lower Bound: Lower bound age has to be higher than upper bound age')
+    cy.get('[id=write-button]').should('be.disabled')
+
+    cy.get('[data-cy=add-new-up-bound-form]').click()
+    cy.get('[name=age]').clear()
+    cy.get('[name=age]').type('11.02')
+    cy.contains('Save').click()
+    cy.get('[id=write-button]').should('not.be.disabled')
+
+    cy.get('[data-cy=add-new-low-bound-form]').click()
+    cy.get('[name=b_name]').type('new lower time bound name')
+    cy.get('[name=b_comment]').type('test comment')
+    cy.get('[name=age]').type('0.5')
+    cy.contains('Save').click()
+
+    cy.contains('Upper Bound: Upper bound age has to be lower than lower bound age')
+    cy.contains('Lower Bound: Lower bound age has to be higher than upper bound age')
+    cy.get('[id=write-button]').should('be.disabled')
+
+    cy.get('[data-cy=add-new-low-bound-form]').click()
+    cy.get('[name=age]').clear()
+    cy.get('[name=age]').type('15.55')
+    cy.contains('Save').click()
+    cy.get('[id=write-button]').should('not.be.disabled')
+  })
+
+  it('with incorrect, existing bounds does not work', () => {
     cy.visit(`/time-unit/bahean?tab=0`)
     cy.contains('Bahean')
     cy.get('[id=edit-button]').click()
diff --git a/frontend/src/components/DetailView/common/EditingForm.tsx b/frontend/src/components/DetailView/common/EditingForm.tsx
index c257e92d..c0ba3d55 100755
--- a/frontend/src/components/DetailView/common/EditingForm.tsx
+++ b/frontend/src/components/DetailView/common/EditingForm.tsx
@@ -13,12 +13,14 @@ If using for adding new, provide arrayFieldName.
 For editing existing row, use existingObject and editAction.
 */
 export const EditingForm = <T extends object, ParentType extends object>({
+  dataCy,
   buttonText,
   formFields,
   editAction,
   existingObject,
   arrayFieldName,
 }: {
+  dataCy?: string
   buttonText: string
   formFields: EditingFormField[]
   arrayFieldName?: keyof ParentType
@@ -48,7 +50,7 @@ export const EditingForm = <T extends object, ParentType extends object>({
   }
 
   return (
-    <EditingModal {...{ buttonText, onSave }}>
+    <EditingModal {...{ dataCy, buttonText, onSave }}>
       <Box sx={{ display: 'flex', flexDirection: 'column', gap: '1em' }}>
         {formFields.map(field => (
           <TextField
diff --git a/frontend/src/components/TimeUnit/Tabs/TimeUnitTab.tsx b/frontend/src/components/TimeUnit/Tabs/TimeUnitTab.tsx
index a2cebb65..55a54ccd 100755
--- a/frontend/src/components/TimeUnit/Tabs/TimeUnitTab.tsx
+++ b/frontend/src/components/TimeUnit/Tabs/TimeUnitTab.tsx
@@ -82,6 +82,7 @@ export const TimeUnitTab = () => {
           {!mode.read && (
             <Box display="flex" gap={1} marginBottom={'15px'}>
               <EditingForm<TimeBound, TimeUnitDetailsType>
+                dataCy="add-new-up-bound-form"
                 buttonText="Add new time bound"
                 formFields={formFields}
                 editAction={(newUpTimeBound: TimeBound) => {
@@ -105,6 +106,7 @@ export const TimeUnitTab = () => {
           {!mode.read && (
             <Box display="flex" gap={1} marginBottom={'15px'}>
               <EditingForm<TimeBound, TimeUnitDetailsType>
+                dataCy="add-new-low-bound-form"
                 buttonText="Add new time bound"
                 formFields={formFields}
                 editAction={(newLowTimeBound: TimeBound) => {