diff --git a/cache_test.go b/cache_test.go
index 3d27d85..a3b1601 100644
--- a/cache_test.go
+++ b/cache_test.go
@@ -418,7 +418,7 @@ func Test_Cache_GetAvailabilityZones(t *testing.T) { //nolint:funlen
 					return a < b
 				}),
 			}...); diff != "" {
-				t.Errorf(diff)
+				t.Errorf("%s", diff)
 			}
 		})
 	}
@@ -568,7 +568,7 @@ func Test_Cache_GetVirtualMachineAvailabilityZonesForSize(t *testing.T) { //noli
 					return a < b
 				}),
 			}...); diff != "" {
-				t.Fatalf(diff)
+				t.Fatalf("%s", diff)
 			}
 		})
 	}
diff --git a/ci/cover.sh b/ci/cover.sh
index 022308c..208b4dd 100755
--- a/ci/cover.sh
+++ b/ci/cover.sh
@@ -4,25 +4,23 @@ set -o pipefail
 set -o nounset
 set -x
 
+TOOLMOD="${GITHUB_WORKSPACE}/.tools"
+
 function deps() {
-    mkdir -p "${GITHUB_WORKSPACE}/tmp"
-    pushd "${GITHUB_WORKSPACE}/tmp"
-    go mod init tmp
-    go install github.com/axw/gocov/gocov@latest
-    go install github.com/AlekSi/gocov-xml@latest
-    go install github.com/wadey/gocovmerge@latest
-    cp "$(go env GOPATH)/bin/gocov" "${GITHUB_WORKSPACE}/bin/gocov"
-    cp "$(go env GOPATH)/bin/gocov-xml" "${GITHUB_WORKSPACE}/bin/gocov-xml"
-    cp "$(go env GOPATH)/bin/gocovmerge" "${GITHUB_WORKSPACE}/bin/gocovmerge"
+    mkdir -p "${TOOLMOD}"
+    pushd "${TOOLMOD}"
+    go mod init tools
+    go get -tool github.com/axw/gocov/gocov@latest
+    go get -tool github.com/AlekSi/gocov-xml@latest
+    go get -tool github.com/wadey/gocovmerge@latest
+    go get golang.org/x/tools@latest
+    go mod tidy
     popd
-    rm -rf "${GITHUB_WORKSPACE}/tmp"
 }
 
 function init() {
+    export GOTOOLCHAIN=go1.25.0
     go env
-    mkdir -p "${GITHUB_WORKSPACE}/bin"
-    mkdir -p "${GITHUB_WORKSPACE}/tmp"
-    export PATH=$PATH:${GITHUB_WORKSPACE}/bin
 }
 
 function test() {
@@ -38,10 +36,10 @@ function test() {
     
     # Merge coverage files
     echo "Merging coverage files..."
-    gocovmerge coverage-v1.out coverage-v2.out > coverage.out
+    go -C "${TOOLMOD}" tool gocovmerge "${GITHUB_WORKSPACE}/coverage-v1.out" "${GITHUB_WORKSPACE}/coverage-v2.out" > coverage.out
     
     # Convert merged coverage to XML
-    gocov convert coverage.out | gocov-xml > coverage.xml
+    go -C "${TOOLMOD}" tool gocov convert "${GITHUB_WORKSPACE}/coverage.out" | go -C "${TOOLMOD}" tool gocov-xml > coverage.xml
     
     # Clean up intermediate files
     rm coverage-v1.out coverage-v2.out coverage.out
diff --git a/go.mod b/go.mod
index 4af3a20..1c76391 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/Azure/skewer
 
-go 1.18
+go 1.25
 
 require (
 	github.com/Azure/azure-sdk-for-go v68.0.0+incompatible
diff --git a/v2/go.mod b/v2/go.mod
index d12e158..b5821e7 100644
--- a/v2/go.mod
+++ b/v2/go.mod
@@ -1,6 +1,6 @@
 module github.com/Azure/skewer/v2
 
-go 1.23.0
+go 1.25
 
 require (
 	github.com/Azure/azure-sdk-for-go/sdk/azcore v1.19.1