diff --git a/src/types/index.d.ts b/src/types/index.d.ts
index 32831adc88c..a33ec135418 100644
--- a/src/types/index.d.ts
+++ b/src/types/index.d.ts
@@ -3764,7 +3764,7 @@ export interface ChartTypeRegistry {
   line: {
     chartOptions: LineControllerChartOptions;
     datasetOptions: LineControllerDatasetOptions & FillerControllerDatasetOptions;
-    defaultDataPoint: ScatterDataPoint | number | null;
+    defaultDataPoint: ScatterDataPoint | number | [number, number] | null;
     metaExtensions: {};
     parsedDataType: CartesianParsedData;
     scales: keyof CartesianScaleTypeRegistry;
@@ -3772,7 +3772,7 @@ export interface ChartTypeRegistry {
   scatter: {
     chartOptions: ScatterControllerChartOptions;
     datasetOptions: ScatterControllerDatasetOptions;
-    defaultDataPoint: ScatterDataPoint | number | null;
+    defaultDataPoint: ScatterDataPoint | number | [number, number] | null;
     metaExtensions: {};
     parsedDataType: CartesianParsedData;
     scales: keyof CartesianScaleTypeRegistry;
diff --git a/test/types/data_types.ts b/test/types/data_types.ts
index 48a60598ffe..2303296f47a 100644
--- a/test/types/data_types.ts
+++ b/test/types/data_types.ts
@@ -8,6 +8,14 @@ const chart = new Chart('chart', {
   }
 });
 
+const lineTupleChart = new Chart('lineTupleChart', {
+  type: 'line',
+  data: {
+    labels: ['1', '2', '3'],
+    datasets: [{ data: [[1, 2], [3, 4], [5, 6]] }],
+  }
+});
+
 const chart2 = new Chart('chart2', {
   type: 'bar',
   data: {
diff --git a/test/types/dataset_null_data.ts b/test/types/dataset_null_data.ts
index 9b02635ad5b..91a67b9b6b4 100644
--- a/test/types/dataset_null_data.ts
+++ b/test/types/dataset_null_data.ts
@@ -14,3 +14,11 @@ const radarDataset: ChartDataset<'radar'> = {
   data: [10, null, 20],
 };
 
+// [number, number] tuple data must be accepted for line and scatter, matching bar's floating-range behaviour
+const lineTupleDataset: ChartDataset<'line'> = {
+  data: [[1, 2], [3, 4], [5, 6]],
+};
+const scatterTupleDataset: ChartDataset<'scatter'> = {
+  data: [[1, 2], [3, 4], [5, 6]],
+};
+