diff --git a/web/src/components/ui/charts/BusterChartJS/helpers/formatChartLabel.test.ts b/web/src/components/ui/charts/BusterChartJS/helpers/formatChartLabel.test.ts
index 8a8344de6..a9449de54 100644
--- a/web/src/components/ui/charts/BusterChartJS/helpers/formatChartLabel.test.ts
+++ b/web/src/components/ui/charts/BusterChartJS/helpers/formatChartLabel.test.ts
@@ -147,4 +147,96 @@ describe('formatChartLabel', () => {
     const result = formatChartLabel('numeric_field__🔑__1234.567', columnLabelFormats, true, false);
     expect(result).toBe('$1,234.57 USD');
   });
+
+  it('should format compact numbers correctly', () => {
+    const columnLabelFormats = {
+      numeric_field: {
+        style: 'number',
+        compactNumbers: true,
+        columnType: 'number',
+        displayName: '',
+        numberSeparatorStyle: ',',
+        minimumFractionDigits: 1,
+        maximumFractionDigits: 1,
+        multiplier: 1,
+        makeLabelHumanReadable: true
+      }
+    } satisfies NonNullable<BusterChartProps['columnLabelFormats']>;
+
+    const result = formatChartLabel('numeric_field__🔑__1234567', columnLabelFormats, true, false);
+    expect(result).toBe('1.2M');
+  });
+
+  it('should apply multiplier to numbers correctly', () => {
+    const columnLabelFormats = {
+      numeric_field: {
+        style: 'number',
+        compactNumbers: false,
+        columnType: 'number',
+        displayName: '',
+        numberSeparatorStyle: ',',
+        minimumFractionDigits: 2,
+        maximumFractionDigits: 2,
+        multiplier: 100,
+        suffix: '%',
+        makeLabelHumanReadable: true
+      }
+    } satisfies NonNullable<BusterChartProps['columnLabelFormats']>;
+
+    const result = formatChartLabel('numeric_field__🔑__0.756', columnLabelFormats, true, false);
+    expect(result).toBe('75.60%');
+  });
+
+  it('should handle negative numbers with custom formatting', () => {
+    const columnLabelFormats = {
+      numeric_field: {
+        style: 'number',
+        compactNumbers: false,
+        columnType: 'number',
+        displayName: '',
+        numberSeparatorStyle: ',',
+        minimumFractionDigits: 0,
+        maximumFractionDigits: 0,
+        prefix: '(',
+        suffix: ')',
+        makeLabelHumanReadable: true
+      }
+    } satisfies NonNullable<BusterChartProps['columnLabelFormats']>;
+
+    const result = formatChartLabel('numeric_field__🔑__-42', columnLabelFormats, true, false);
+    expect(result).toBe('(-42)');
+  });
+
+  it('should handle text fields with custom display names', () => {
+    const columnLabelFormats = {
+      text_field: {
+        style: 'string',
+        columnType: 'text',
+        displayName: 'Customer Status',
+        makeLabelHumanReadable: true
+      }
+    } satisfies NonNullable<BusterChartProps['columnLabelFormats']>;
+
+    const result = formatChartLabel('text_field__🔑__active', columnLabelFormats, false, false);
+    expect(result).toBe('Active');
+  });
+
+  it('should handle text fields with special characters and spaces', () => {
+    const columnLabelFormats = {
+      text_field: {
+        style: 'string',
+        columnType: 'text',
+        displayName: '',
+        makeLabelHumanReadable: true
+      }
+    } satisfies NonNullable<BusterChartProps['columnLabelFormats']>;
+
+    let result = formatChartLabel(
+      'text_field__🔑__high_priority_item',
+      columnLabelFormats,
+      false,
+      false
+    );
+    expect(result).toBe('High Priority Item');
+  });
 });