diff --git a/go.mod b/go.mod
index e7df85b..c7e0f88 100644
--- a/go.mod
+++ b/go.mod
@@ -5,7 +5,7 @@ go 1.22
 require (
 	github.com/pkg/errors v0.9.1
 	github.com/rs/zerolog v1.32.0
-	github.com/stretchr/testify v1.8.4
+	github.com/stretchr/testify v1.9.0
 	github.com/wtsi-npg/logshim v1.4.0
 )
 
diff --git a/go.sum b/go.sum
index 624fd6c..2e97817 100644
--- a/go.sum
+++ b/go.sum
@@ -14,8 +14,8 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN
 github.com/rs/xid v1.5.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg=
 github.com/rs/zerolog v1.32.0 h1:keLypqrlIjaFsbmJOBdB/qvyF8KEtCWHwobLp5l/mQ0=
 github.com/rs/zerolog v1.32.0/go.mod h1:/7mN4D5sKwJLZQ2b/znpjC3/GQWY/xaDXUM0kKWRHss=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 github.com/wtsi-npg/logshim v1.4.0 h1:5O4urpYxyGbAutS6wci0VSvCCpteVtP9PTIBt0fA0+8=
 github.com/wtsi-npg/logshim v1.4.0/go.mod h1:VnMVDZWHLrWeEXztdKog4ruSy0RIoaj3tuED9kw+cHc=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=