diff --git a/agent/agent_test.go b/agent/agent_test.go
index 17726d8474..fecd1c208d 100644
--- a/agent/agent_test.go
+++ b/agent/agent_test.go
@@ -133,6 +133,7 @@ func TestAgent_RPCPing(t *testing.T) {
 	t.Parallel()
 	a := NewTestAgent(t, t.Name(), "")
 	defer a.Shutdown()
+	testrpc.WaitForTestAgent(t, a.RPC, "dc1")
 
 	var out struct{}
 	if err := a.RPC("Status.Ping", struct{}{}, &out); err != nil {
diff --git a/agent/checks/check_test.go b/agent/checks/check_test.go
index 3597bc70bd..014d58302b 100644
--- a/agent/checks/check_test.go
+++ b/agent/checks/check_test.go
@@ -517,6 +517,9 @@ func TestCheckTCPPassing(t *testing.T) {
 	if os.Getenv("TRAVIS") == "true" {
 		t.Skip("IPV6 not supported on travis-ci")
 	}
+	if os.Getenv("CIRCLECI") == "true" {
+		t.Skip("IPV6 not supported on CircleCI")
+	}
 	tcpServer = mockTCPServer(`tcp6`)
 	expectTCPStatus(t, tcpServer.Addr().String(), api.HealthPassing)
 	tcpServer.Close()
diff --git a/agent/consul/client_test.go b/agent/consul/client_test.go
index 784ec1ef2b..ef25dbf884 100644
--- a/agent/consul/client_test.go
+++ b/agent/consul/client_test.go
@@ -84,8 +84,10 @@ func TestClient_JoinLAN(t *testing.T) {
 	defer os.RemoveAll(dir2)
 	defer c1.Shutdown()
 
+	testrpc.WaitForLeader(t, s1.RPC, "dc1")
 	// Try to join
 	joinLAN(t, c1, s1)
+	testrpc.WaitForTestAgent(t, c1.RPC, "dc1")
 	retry.Run(t, func(r *retry.R) {
 		if got, want := c1.routers.NumServers(), 1; got != want {
 			r.Fatalf("got %d servers want %d", got, want)
diff --git a/agent/consul/session_ttl_test.go b/agent/consul/session_ttl_test.go
index fe668a0a05..abc30e599b 100644
--- a/agent/consul/session_ttl_test.go
+++ b/agent/consul/session_ttl_test.go
@@ -162,10 +162,11 @@ func TestResetSessionTimerLocked(t *testing.T) {
 		t.Fatalf("missing timer")
 	}
 
-	time.Sleep(10 * time.Millisecond * structs.SessionTTLMultiplier)
-	if s1.sessionTimers.Get("foo") != nil {
-		t.Fatalf("timer should be gone")
-	}
+	retry.Run(t, func(r *retry.R) {
+		if s1.sessionTimers.Get("foo") != nil {
+			r.Fatal("timer should be gone")
+		}
+	})
 }
 
 func TestResetSessionTimerLocked_Renew(t *testing.T) {
diff --git a/agent/dns_test.go b/agent/dns_test.go
index 4c1316f977..63c52e7265 100644
--- a/agent/dns_test.go
+++ b/agent/dns_test.go
@@ -4151,7 +4151,7 @@ func testDNSServiceLookupResponseLimits(t *testing.T, answerLimit int, qType uin
 		}
 	`)
 	defer a.Shutdown()
-	testrpc.WaitForLeader(t, a.RPC, "dc1")
+	testrpc.WaitForTestAgent(t, a.RPC, "dc1")
 
 	for i := 0; i < generateNumNodes; i++ {
 		nodeAddress := fmt.Sprintf("127.0.0.%d", i+1)
@@ -4241,7 +4241,7 @@ func checkDNSService(t *testing.T, generateNumNodes int, aRecordLimit int, qType
 		}
 	`)
 	defer a.Shutdown()
-	testrpc.WaitForLeader(t, a.RPC, "dc1")
+	testrpc.WaitForTestAgent(t, a.RPC, "dc1")
 
 	for i := 0; i < generateNumNodes; i++ {
 		nodeAddress := fmt.Sprintf("127.0.0.%d", i+1)
diff --git a/agent/local/state_test.go b/agent/local/state_test.go
index bc5ebc390c..046ac47f75 100644
--- a/agent/local/state_test.go
+++ b/agent/local/state_test.go
@@ -1733,18 +1733,18 @@ func TestAgent_CheckCriticalTime(t *testing.T) {
 	if c, ok := l.CriticalCheckStates()[checkID]; !ok {
 		t.Fatalf("should have a critical check")
 	} else if c.CriticalFor() > time.Millisecond {
-		t.Fatalf("bad: %#v", c)
+		t.Fatalf("bad: %#v, check was critical for %v", c, c.CriticalFor())
 	}
 
 	// Wait a while, then fail it again and make sure the time keeps track
-	// of the initial failure, and doesn't reset here.
+	// of the initial failure, and doesn't reset here. Since we are sleeping for
+	// 50ms the check should not be any less than that.
 	time.Sleep(50 * time.Millisecond)
 	l.UpdateCheck(chk.CheckID, api.HealthCritical, "")
 	if c, ok := l.CriticalCheckStates()[checkID]; !ok {
 		t.Fatalf("should have a critical check")
-	} else if c.CriticalFor() < 25*time.Millisecond ||
-		c.CriticalFor() > 75*time.Millisecond {
-		t.Fatalf("bad: %#v", c)
+	} else if c.CriticalFor() < 50*time.Millisecond {
+		t.Fatalf("bad: %#v, check was critical for %v", c, c.CriticalFor())
 	}
 
 	// Set it passing again.
@@ -1759,7 +1759,7 @@ func TestAgent_CheckCriticalTime(t *testing.T) {
 	if c, ok := l.CriticalCheckStates()[checkID]; !ok {
 		t.Fatalf("should have a critical check")
 	} else if c.CriticalFor() > time.Millisecond {
-		t.Fatalf("bad: %#v", c)
+		t.Fatalf("bad: %#v, check was critical for %v", c, c.CriticalFor())
 	}
 }
 
diff --git a/agent/operator_endpoint_test.go b/agent/operator_endpoint_test.go
index a05d8de3da..bf6c838f90 100644
--- a/agent/operator_endpoint_test.go
+++ b/agent/operator_endpoint_test.go
@@ -346,6 +346,7 @@ func TestOperator_AutopilotCASConfiguration(t *testing.T) {
 	t.Parallel()
 	a := NewTestAgent(t, t.Name(), "")
 	defer a.Shutdown()
+	testrpc.WaitForTestAgent(t, a.RPC, "dc1")
 
 	body := bytes.NewBuffer([]byte(`{"CleanupDeadServers": false}`))
 	req, _ := http.NewRequest("PUT", "/v1/operator/autopilot/configuration", body)
diff --git a/agent/snapshot_endpoint_test.go b/agent/snapshot_endpoint_test.go
index 33d58ca12b..1d7d665585 100644
--- a/agent/snapshot_endpoint_test.go
+++ b/agent/snapshot_endpoint_test.go
@@ -9,14 +9,16 @@ import (
 	"testing"
 
 	"github.com/hashicorp/consul/acl"
+	"github.com/hashicorp/consul/testrpc"
 )
 
 func TestSnapshot(t *testing.T) {
 	t.Parallel()
 	var snap io.Reader
-	t.Run("", func(t *testing.T) {
+	t.Run("create snapshot", func(t *testing.T) {
 		a := NewTestAgent(t, t.Name(), "")
 		defer a.Shutdown()
+		testrpc.WaitForTestAgent(t, a.RPC, "dc1")
 
 		body := bytes.NewBuffer(nil)
 		req, _ := http.NewRequest("GET", "/v1/snapshot?token=root", body)
@@ -40,9 +42,10 @@ func TestSnapshot(t *testing.T) {
 		}
 	})
 
-	t.Run("", func(t *testing.T) {
+	t.Run("restore snapshot", func(t *testing.T) {
 		a := NewTestAgent(t, t.Name(), "")
 		defer a.Shutdown()
+		testrpc.WaitForTestAgent(t, a.RPC, "dc1")
 
 		req, _ := http.NewRequest("PUT", "/v1/snapshot?token=root", snap)
 		resp := httptest.NewRecorder()
diff --git a/api/acl_test.go b/api/acl_test.go
index 17b193214d..dff29bba7c 100644
--- a/api/acl_test.go
+++ b/api/acl_test.go
@@ -498,6 +498,7 @@ func TestAPI_ACLToken_List(t *testing.T) {
 	defer s.Stop()
 
 	acl := c.ACL()
+	s.WaitForSerfCheck(t)
 
 	policies := prepTokenPolicies(t, acl)
 
diff --git a/api/agent_test.go b/api/agent_test.go
index 4bb48d8595..c11137dc3a 100644
--- a/api/agent_test.go
+++ b/api/agent_test.go
@@ -42,6 +42,8 @@ func TestAPI_AgentMetrics(t *testing.T) {
 	defer s.Stop()
 
 	agent := c.Agent()
+	s.WaitForSerfCheck(t)
+
 	timer := &retry.Timer{Timeout: 10 * time.Second, Wait: 500 * time.Millisecond}
 	retry.RunWith(timer, t, func(r *retry.R) {
 		metrics, err := agent.Metrics()
@@ -171,6 +173,7 @@ func TestAPI_AgentServices(t *testing.T) {
 	defer s.Stop()
 
 	agent := c.Agent()
+	s.WaitForSerfCheck(t)
 
 	reg := &AgentServiceRegistration{
 		Name: "foo",
@@ -296,6 +299,7 @@ func TestAPI_AgentServices_ManagedConnectProxyDeprecatedUpstreams(t *testing.T)
 	defer s.Stop()
 
 	agent := c.Agent()
+	s.WaitForSerfCheck(t)
 
 	reg := &AgentServiceRegistration{
 		Name: "foo",
@@ -745,6 +749,7 @@ func TestAPI_AgentSetTTLStatus(t *testing.T) {
 	defer s.Stop()
 
 	agent := c.Agent()
+	s.WaitForSerfCheck(t)
 
 	reg := &AgentServiceRegistration{
 		Name: "foo",
@@ -959,6 +964,7 @@ func TestAPI_AgentChecks_serviceBound(t *testing.T) {
 	defer s.Stop()
 
 	agent := c.Agent()
+	s.WaitForSerfCheck(t)
 
 	// First register a service
 	serviceReg := &AgentServiceRegistration{
@@ -1200,6 +1206,7 @@ func TestAPI_NodeMaintenance(t *testing.T) {
 	defer s.Stop()
 
 	agent := c.Agent()
+	s.WaitForSerfCheck(t)
 
 	// Enable maintenance mode
 	if err := agent.EnableNodeMaintenance("broken"); err != nil {
diff --git a/api/catalog_test.go b/api/catalog_test.go
index d6018a546a..968fb84820 100644
--- a/api/catalog_test.go
+++ b/api/catalog_test.go
@@ -32,6 +32,7 @@ func TestAPI_CatalogNodes(t *testing.T) {
 	c, s := makeClient(t)
 	defer s.Stop()
 
+	s.WaitForSerfCheck(t)
 	catalog := c.Catalog()
 	retry.RunWith(retry.ThreeTimes(), t, func(r *retry.R) {
 		nodes, meta, err := catalog.Nodes(nil)
diff --git a/api/connect_ca_test.go b/api/connect_ca_test.go
index e8b60737bf..c8c63f2a3a 100644
--- a/api/connect_ca_test.go
+++ b/api/connect_ca_test.go
@@ -19,6 +19,8 @@ func TestAPI_ConnectCARoots_empty(t *testing.T) {
 	})
 	defer s.Stop()
 
+	s.WaitForSerfCheck(t)
+
 	connect := c.Connect()
 	_, _, err := connect.CARoots(nil)
 
@@ -58,6 +60,7 @@ func TestAPI_ConnectCAConfig_get_set(t *testing.T) {
 	c, s := makeClient(t)
 	defer s.Stop()
 
+	s.WaitForSerfCheck(t)
 	expected := &ConsulCAProviderConfig{
 		RotationPeriod: 90 * 24 * time.Hour,
 	}
diff --git a/api/coordinate_test.go b/api/coordinate_test.go
index e1aea0edaf..8c8e986145 100644
--- a/api/coordinate_test.go
+++ b/api/coordinate_test.go
@@ -71,6 +71,7 @@ func TestAPI_CoordinateUpdate(t *testing.T) {
 	c, s := makeClient(t)
 	defer s.Stop()
 
+	s.WaitForSerfCheck(t)
 	node := "foo"
 	_, err := c.Catalog().Register(&CatalogRegistration{
 		Node:    node,
diff --git a/api/health_test.go b/api/health_test.go
index 2ce6563700..e6402c653d 100644
--- a/api/health_test.go
+++ b/api/health_test.go
@@ -229,6 +229,8 @@ func TestAPI_HealthChecks_NodeMetaFilter(t *testing.T) {
 	agent := c.Agent()
 	health := c.Health()
 
+	s.WaitForSerfCheck(t)
+
 	// Make a service with a check
 	reg := &AgentServiceRegistration{
 		Name: "foo",
@@ -392,6 +394,8 @@ func TestAPI_HealthConnect(t *testing.T) {
 	agent := c.Agent()
 	health := c.Health()
 
+	s.WaitForSerfCheck(t)
+
 	// Make a service with a proxy
 	reg := &AgentServiceRegistration{
 		Name: "foo",
diff --git a/api/kv_test.go b/api/kv_test.go
index f19cfc1a78..abd21b2d57 100644
--- a/api/kv_test.go
+++ b/api/kv_test.go
@@ -15,6 +15,7 @@ func TestAPI_ClientPutGetDelete(t *testing.T) {
 
 	kv := c.KV()
 
+	s.WaitForSerfCheck(t)
 	// Get a get without a key
 	key := testKey()
 	pair, _, err := kv.Get(key, nil)
@@ -229,6 +230,7 @@ func TestAPI_ClientWatchGet(t *testing.T) {
 
 	kv := c.KV()
 
+	s.WaitForSerfCheck(t)
 	// Get a get without a key
 	key := testKey()
 	pair, meta, err := kv.Get(key, nil)
diff --git a/api/semaphore_test.go b/api/semaphore_test.go
index b2ec954ed0..81b959b5ec 100644
--- a/api/semaphore_test.go
+++ b/api/semaphore_test.go
@@ -296,6 +296,7 @@ func TestAPI_SemaphoreConflict(t *testing.T) {
 	c, s := makeClient(t)
 	defer s.Stop()
 
+	s.WaitForSerfCheck(t)
 	lock, session := createTestLock(t, c, "test/sema/.lock")
 	defer session.Destroy(lock.opts.Session, nil)
 
diff --git a/api/snapshot_test.go b/api/snapshot_test.go
index ba371d4e48..938360d494 100644
--- a/api/snapshot_test.go
+++ b/api/snapshot_test.go
@@ -11,6 +11,7 @@ func TestAPI_Snapshot(t *testing.T) {
 	c, s := makeClient(t)
 	defer s.Stop()
 
+	s.WaitForSerfCheck(t)
 	// Place an initial key into the store.
 	kv := c.KV()
 	key := &KVPair{Key: testKey(), Value: []byte("hello")}
diff --git a/command/lock/lock_test.go b/command/lock/lock_test.go
index 3aa1e9ae7f..121046b8a4 100644
--- a/command/lock/lock_test.go
+++ b/command/lock/lock_test.go
@@ -45,7 +45,7 @@ func TestLockCommand(t *testing.T) {
 	a := agent.NewTestAgent(t, t.Name(), ``)
 	defer a.Shutdown()
 
-	testrpc.WaitForLeader(t, a.RPC, "dc1")
+	testrpc.WaitForTestAgent(t, a.RPC, "dc1")
 
 	ui := cli.NewMockUi()
 	c := New(ui)