diff --git a/flake.lock b/flake.lock
index 97e7293..40408a3 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,11 +2,11 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1769461804,
-        "narHash": "sha256-msG8SU5WsBUfVVa/9RPLaymvi5bI8edTavbIq3vRlhI=",
+        "lastModified": 1774386573,
+        "narHash": "sha256-4hAV26quOxdC6iyG7kYaZcM3VOskcPUrdCQd/nx8obc=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "bfc1b8a4574108ceef22f02bafcf6611380c100d",
+        "rev": "46db2e09e1d3f113a13c0d7b81e2f221c63b8ce9",
         "type": "github"
       },
       "original": {
diff --git a/go.mod b/go.mod
index ab355c0..2e3df01 100644
--- a/go.mod
+++ b/go.mod
@@ -4,7 +4,7 @@ go 1.23.0
 
 require (
 	github.com/akedrou/textdiff v0.1.0
-	github.com/rs/zerolog v1.34.0
+	github.com/rs/zerolog v1.35.0
 	github.com/spf13/pflag v1.0.10
 	github.com/stretchr/testify v1.11.1
 )
diff --git a/go.sum b/go.sum
index d15139e..351e68a 100644
--- a/go.sum
+++ b/go.sum
@@ -34,6 +34,8 @@ github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUc
 github.com/rs/xid v1.6.0/go.mod h1:7XoLgs4eV+QndskICGsho+ADou8ySMSjJKDIan90Nz0=
 github.com/rs/zerolog v1.34.0 h1:k43nTLIwcTVQAncfCw4KZ2VY6ukYoZaBPNOE8txlOeY=
 github.com/rs/zerolog v1.34.0/go.mod h1:bJsvje4Z08ROH4Nhs5iH600c3IkWhwp44iRc54W6wYQ=
+github.com/rs/zerolog v1.35.0 h1:VD0ykx7HMiMJytqINBsKcbLS+BJ4WYjz+05us+LRTdI=
+github.com/rs/zerolog v1.35.0/go.mod h1:EjML9kdfa/RMA7h/6z6pYmq1ykOuA8/mjWaEvGI+jcw=
 github.com/sergi/go-diff v1.3.1 h1:xkr+Oxo4BOQKmkn/B9eMK0g5Kg/983T9DqqPHwYqD+8=
 github.com/sergi/go-diff v1.3.1/go.mod h1:aMJSSKb2lpPvRNec0+w3fl7LP9IOFzdc9Pa4NFbPK1I=
 github.com/sergi/go-diff v1.4.0 h1:n/SP9D5ad1fORl+llWyN+D6qoUETXNZARKjyY2/KVCw=
diff --git a/internal/report/console/console.go b/internal/report/console/console.go
index efca37f..f660616 100644
--- a/internal/report/console/console.go
+++ b/internal/report/console/console.go
@@ -10,7 +10,6 @@ import (
 	"github.com/jedib0t/go-pretty/v6/table"
 	"github.com/jedib0t/go-pretty/v6/text"
 	"github.com/rs/zerolog/log"
-	"github.com/sergi/go-diff/diffmatchpatch"
 	"gitlab.com/TECHNOFAB/nixtest/internal/types"
 	"gitlab.com/TECHNOFAB/nixtest/internal/util"
 )
@@ -25,16 +24,10 @@ func PrintErrors(results types.Results, noColor bool) {
 			fmt.Println(text.FgRed.Sprintf("⚠ Test \"%s/%s\" failed:", result.Spec.Suite, result.Spec.Name))
 			message := result.ErrorMessage
 			if result.Status == types.StatusFailure && message == "" {
-				if noColor {
-					var err error
-					message, err = util.ComputeDiff(result.Expected, result.Actual)
-					if err != nil {
-						log.Panic().Err(err).Msg("failed to compute diff")
-					}
-				} else {
-					dmp := diffmatchpatch.New()
-					diffs := dmp.DiffMain(result.Expected, result.Actual, true)
-					message = fmt.Sprintf("Diff:\n%s", dmp.DiffPrettyText(diffs))
+				var err error
+				message, err = util.ComputeDiff(result.Expected, result.Actual)
+				if err != nil {
+					log.Panic().Err(err).Msg("failed to compute diff")
 				}
 			}
 
diff --git a/lib/scriptHelpers.sh b/lib/scriptHelpers.sh
index b1e3514..ba08e47 100644
--- a/lib/scriptHelpers.sh
+++ b/lib/scriptHelpers.sh
@@ -11,16 +11,16 @@ function assert_not_eq() {
   assert "$1 -ne $2" "$3"
 }
 function assert_contains() {
-  echo "$1" | grep -q -- "$2" || {
-    echo "Assertion failed: $3. $1 does not contain $2" >&2;
+  echo -n "$1" | grep -q -- "$2" || {
+    echo "Assertion failed: $3. The following does not contain $2: $1" >&2;
     exit 1;
   }
 }
 function assert_not_contains() {
-  echo "$1" | grep -q -- "$2" && {
-    echo "Assertion failed: $3. $1 does contain $2" >&2;
+  echo -n "$1" | grep -q -- "$2" && {
+    echo "Assertion failed: $3. The following does contain $2: $1" >&2;
     exit 1;
-  }
+  } || true
 }
 function assert_file_contains() {
   grep -q -- "$2" $1 || {
diff --git a/nix/repo/flake.lock b/nix/repo/flake.lock
index c340447..a09aa5e 100644
--- a/nix/repo/flake.lock
+++ b/nix/repo/flake.lock
@@ -38,11 +38,11 @@
     "nixmkdocs-lib": {
       "locked": {
         "dir": "lib",
-        "lastModified": 1767549915,
-        "narHash": "sha256-by3r2qddlyzylup5fzSaDwtoy3eFHNKb65IuIq6bsAs=",
+        "lastModified": 1771673823,
+        "narHash": "sha256-1WFFaQZDPdTX1vL9BP+myIcgZjwvfxSUMGnUTrFmgVc=",
         "owner": "TECHNOFAB",
         "repo": "nixmkdocs",
-        "rev": "f3b2f4b19178e97c5580367be0f97e61a085db6d",
+        "rev": "deebf3dae19776200f9ef016ef6542bf9e17be8d",
         "type": "gitlab"
       },
       "original": {
@@ -81,11 +81,11 @@
     "treefmt-nix": {
       "flake": false,
       "locked": {
-        "lastModified": 1769691507,
-        "narHash": "sha256-8aAYwyVzSSwIhP2glDhw/G0i5+wOrren3v6WmxkVonM=",
+        "lastModified": 1773297127,
+        "narHash": "sha256-6E/yhXP7Oy/NbXtf1ktzmU8SdVqJQ09HC/48ebEGBpk=",
         "owner": "numtide",
         "repo": "treefmt-nix",
-        "rev": "28b19c5844cc6e2257801d43f2772a4b4c050a1b",
+        "rev": "71b125cd05fbfd78cab3e070b73544abe24c5016",
         "type": "github"
       },
       "original": {
diff --git a/package.nix b/package.nix
index fb6c468..ca0e4b4 100644
--- a/package.nix
+++ b/package.nix
@@ -19,6 +19,6 @@ buildGoModule {
         ];
       };
   subPackages = ["cmd/nixtest"];
-  vendorHash = "sha256-WF/lzu9lt9SR3WiA8LLWVT1OwpE3sIOtSqf4HMIMmE8=";
+  vendorHash = "sha256-tojMKT5Mkt7GkdrA3sz8Y54bt26Td/tm/B0E1fwdp1Q=";
   meta.mainProgram = "nixtest";
 }