diff --git a/src/experiments/data/actions.js b/src/experiments/data/actions.js
index 16716d534da..18e74e00b06 100644
--- a/src/experiments/data/actions.js
+++ b/src/experiments/data/actions.js
@@ -51,6 +51,7 @@ export function* toggleExperiment( experimentName, currentVariation, source ) {
 		type: TYPES.TOGGLE_EXPERIMENT,
 		experimentName,
 		newVariation,
+		source,
 	};
 }
 
diff --git a/src/experiments/data/reducer.js b/src/experiments/data/reducer.js
index 2bb33b6dded..9d9fdb60863 100644
--- a/src/experiments/data/reducer.js
+++ b/src/experiments/data/reducer.js
@@ -15,7 +15,8 @@ const reducer = ( state = DEFAULT_STATE, action ) => {
 				experiments: state.experiments.map( ( experiment ) => ( {
 					...experiment,
 					variation:
-						experiment.name === action.experimentName
+						experiment.name === action.experimentName &&
+						experiment.source === action.source
 							? action.newVariation
 							: experiment.variation,
 				} ) ),
diff --git a/src/experiments/index.js b/src/experiments/index.js
index 15fcdad264a..89c6f7e1e3b 100644
--- a/src/experiments/index.js
+++ b/src/experiments/index.js
@@ -20,6 +20,7 @@ function Experiments( { experiments, toggleExperiment } ) {
 					<tr>
 						<th>Experiment</th>
 						<th>Variation</th>
+						<th>Source</th>
 						<th>Toggle</th>
 					</tr>
 				</thead>
@@ -32,6 +33,7 @@ function Experiments( { experiments, toggleExperiment } ) {
 										{ name }
 									</td>
 									<td align="center">{ variation }</td>
+									<td align="center">{ source }</td>
 									<td align="center">
 										<Button
 											onClick={ () => {