diff --git a/cmd/rv/main.go b/cmd/rv/main.go
index ba5b6b55..817a0e18 100644
--- a/cmd/rv/main.go
+++ b/cmd/rv/main.go
@@ -67,7 +67,6 @@ import (
 	"bitbucket.org/ausocean/av/container/mts/meta"
 	"bitbucket.org/ausocean/av/revid"
 	"bitbucket.org/ausocean/av/revid/config"
-	"bitbucket.org/ausocean/av/turbidity"
 	"bitbucket.org/ausocean/iot/pi/netlogger"
 	"bitbucket.org/ausocean/iot/pi/netsender"
 	"bitbucket.org/ausocean/iot/pi/sds"
@@ -118,14 +117,6 @@ const (
 // This is set to true if the 'profile' build tag is provided on build.
 var canProfile = false
 
-type turbidityProbe struct {
-	sharpness, contrast float64
-	delay               time.Duration
-	ticker              time.Ticker
-	ts                  *turbidity.TurbiditySensor
-	log                 logger.Logger
-}
-
 func main() {
 	mts.Meta = meta.NewWith([][2]string{{metaPreambleKey, metaPreambleData}})
 
diff --git a/cmd/rv/probe.go b/cmd/rv/probe.go
index ac4a90a3..d58d92d9 100644
--- a/cmd/rv/probe.go
+++ b/cmd/rv/probe.go
@@ -52,6 +52,14 @@ const (
 	maxImages = 10 // Max number of images read when evaluating turbidity.
 )
 
+type turbidityProbe struct {
+	sharpness, contrast float64
+	delay               time.Duration
+	ticker              time.Ticker
+	ts                  *turbidity.TurbiditySensor
+	log                 logger.Logger
+}
+
 // NewTurbidityProbe returns a new turbidity probe.
 func NewTurbidityProbe(log logger.Logger, delay time.Duration) (*turbidityProbe, error) {
 	tp := new(turbidityProbe)
diff --git a/cmd/rv/probe_circleci.go b/cmd/rv/probe_circleci.go
index a63e6e77..26175f3b 100644
--- a/cmd/rv/probe_circleci.go
+++ b/cmd/rv/probe_circleci.go
@@ -35,14 +35,17 @@ import (
 	"bitbucket.org/ausocean/utils/logger"
 )
 
-// NewTurbidityProbe returns a new turbidity probe.
+type turbidityProbe struct {
+	sharpness, contrast float64
+}
+
+// NewTurbidityProbe returns a empty turbidity probe for CircleCI testing only.
 func NewTurbidityProbe(log logger.Logger, delay time.Duration) (*turbidityProbe, error) {
 	tp := new(turbidityProbe)
 	return tp, nil
 }
 
-// Write, reads input h264 frames in the form of a byte stream and writes the the sharpness and contrast
-// scores of a video to the the turbidity probe.
+// Write performs no operation for CircleCI testing only.
 func (tp *turbidityProbe) Write(p []byte) (int, error) {
 	return len(p), nil
 }
diff --git a/turbidity/turbidity.go b/turbidity/turbidity.go
index 8456e174..75eac3d6 100644
--- a/turbidity/turbidity.go
+++ b/turbidity/turbidity.go
@@ -1,3 +1,6 @@
+//go:build !nocv
+// +build !nocv
+
 /*
 DESCRIPTION
   Holds the turbidity sensor struct. Can evaluate 4x4 chessboard markers in an