diff --git a/src/state/CallViewModel.test.ts b/src/state/CallViewModel.test.ts
index 968f87fe..804157db 100644
--- a/src/state/CallViewModel.test.ts
+++ b/src/state/CallViewModel.test.ts
@@ -248,7 +248,7 @@ function withCallViewModel(
 }
 
 test("participants are retained during a focus switch", () => {
-  withTestScheduler(({ cold, expectObservable }) => {
+  withTestScheduler(({ hot, expectObservable }) => {
     // Participants disappear on frame 2 and come back on frame 3
     const participantMarbles = "a-ba";
     // Start switching focus on frame 1 and reconnect on frame 3
@@ -257,12 +257,12 @@ test("participants are retained during a focus switch", () => {
     const layoutMarbles = "     a";
 
     withCallViewModel(
-      cold(participantMarbles, {
+      hot(participantMarbles, {
         a: [aliceParticipant, bobParticipant],
         b: [],
       }),
       of([aliceRtcMember, bobRtcMember]),
-      cold(connectionMarbles, {
+      hot(connectionMarbles, {
         c: ConnectionState.Connected,
         s: ECAddonConnectionState.ECSwitchingFocus,
       }),
@@ -281,7 +281,7 @@ test("participants are retained during a focus switch", () => {
 });
 
 test("screen sharing activates spotlight layout", () => {
-  withTestScheduler(({ cold, schedule, expectObservable }) => {
+  withTestScheduler(({ hot, schedule, expectObservable }) => {
     // Start with no screen shares, then have Alice and Bob share their screens,
     // then return to no screen shares, then have just Alice share for a bit
     const participantMarbles = " abcda-ba";
@@ -294,7 +294,7 @@ test("screen sharing activates spotlight layout", () => {
     const layoutMarbles = "      abcdaefeg";
     const showSpeakingMarbles = "y----nyny";
     withCallViewModel(
-      cold(participantMarbles, {
+      hot(participantMarbles, {
         a: [aliceParticipant, bobParticipant],
         b: [aliceSharingScreen, bobParticipant],
         c: [aliceSharingScreen, bobSharingScreen],
@@ -417,7 +417,7 @@ test("participants stay in the same order unless to appear/disappear", () => {
 });
 
 test("spotlight speakers swap places", () => {
-  withTestScheduler(({ cold, schedule, expectObservable }) => {
+  withTestScheduler(({ hot, schedule, expectObservable }) => {
     // Go immediately into spotlight mode for the test
     const modeMarbles = "     s";
     // First Bob speaks, then Dave, then Alice
@@ -435,9 +435,9 @@ test("spotlight speakers swap places", () => {
       of([aliceRtcMember, bobRtcMember, daveRtcMember]),
       of(ConnectionState.Connected),
       new Map([
-        [aliceParticipant, cold(aSpeakingMarbles, { y: true, n: false })],
-        [bobParticipant, cold(bSpeakingMarbles, { y: true, n: false })],
-        [daveParticipant, cold(dSpeakingMarbles, { y: true, n: false })],
+        [aliceParticipant, hot(aSpeakingMarbles, { y: true, n: false })],
+        [bobParticipant, hot(bSpeakingMarbles, { y: true, n: false })],
+        [daveParticipant, hot(dSpeakingMarbles, { y: true, n: false })],
       ]),
       (vm) => {
         schedule(modeMarbles, { s: () => vm.setGridMode("spotlight") });