diff --git a/assets/src/scripts/monitoring-location/components/hydrograph/selectors/layout.js b/assets/src/scripts/monitoring-location/components/hydrograph/selectors/layout.js
index cd58778a97d2a123f8e4f5d7db8baca084cdaa8d..66bb1c850b3cf90d1798686d0fbe1b6fd6ea2f28 100644
--- a/assets/src/scripts/monitoring-location/components/hydrograph/selectors/layout.js
+++ b/assets/src/scripts/monitoring-location/components/hydrograph/selectors/layout.js
@@ -73,5 +73,5 @@ export const getLayout = memoize(kind => createSelector(
     }
 ));
 
-export const getMainLayout = getLayout();
+export const getMainLayout = getLayout('MAIN');
 export const getBrushLayout = getLayout('BRUSH');
\ No newline at end of file
diff --git a/assets/src/scripts/monitoring-location/components/hydrograph/selectors/layout.test.js b/assets/src/scripts/monitoring-location/components/hydrograph/selectors/layout.test.js
index 6e902fa2e63276264d0618b3aef8ce8b7eecabfb..d969339ed7bcaef3a31c58c8b61b64a997b948a2 100644
--- a/assets/src/scripts/monitoring-location/components/hydrograph/selectors/layout.test.js
+++ b/assets/src/scripts/monitoring-location/components/hydrograph/selectors/layout.test.js
@@ -16,5 +16,24 @@ describe('monitoring-location/components/hydrograph/layout module', () => {
         expect(layout.width).toEqual(200);
         expect(layout.height).toEqual(200 * ASPECT_RATIO);
         expect(layout.windowWidth).toEqual(600);
+        expect(layout.margin.bottom).toEqual(5);
+        expect(layout.margin.top).toEqual(25);
+        expect(layout.margin.left).toEqual(45);
+        expect(layout.margin.right).toEqual(25);
+    });
+
+    it('expects that margins will adjust for secondary y-axis', () => {
+        const layout = getMainLayout.resultFunc(200, 600, {
+            tickValues: [5, 10, 15],
+            tickFormat: format('d')
+        }, '00065');
+
+        expect(layout.width).toEqual(200);
+        expect(layout.height).toEqual(200 * ASPECT_RATIO);
+        expect(layout.windowWidth).toEqual(600);
+        expect(layout.margin.bottom).toEqual(5);
+        expect(layout.margin.top).toEqual(25);
+        expect(layout.margin.left).toEqual(45);
+        expect(layout.margin.right).toEqual(45);
     });
 });