diff --git a/.gitignore b/.gitignore
index 3ee4fe849..d5067be9f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,6 +18,7 @@ docs.kosli.com/content/client_reference/kosli*
 docs.kosli.com/public/
 docs.kosli.com/.netlify
 *.tar.gz
+/.idea
 # keep it uncommented on main
 docs.kosli.com/assets/metadata.json
 tmp/
diff --git a/Makefile b/Makefile
index bcbf45a34..851d706e8 100644
--- a/Makefile
+++ b/Makefile
@@ -69,14 +69,17 @@ ensure_network:
 ensure_gotestsum:
 	@go install gotest.tools/gotestsum@latest
 
+clear_local_image_ref:
+	rm /tmp/server-image.txt
+
 test_setup: ensure_gotestsum
 # cat and exit if error
-	./hack/get-server-image.sh > /tmp/server-image.txt || (cat /tmp/server-image.txt && exit 1) 
+	@test -f /tmp/server-image.txt || ./hack/get-server-image.sh /tmp/server-image.txt
 	export KOSLI_SERVER_IMAGE=$$(cat /tmp/server-image.txt) && ./bin/reset-or-start-server.sh
 
 test_setup_restart_server: ensure_gotestsum
 # cat and exit if error
-	./hack/get-server-image.sh > /tmp/server-image.txt || (cat /tmp/server-image.txt && exit 1)
+	@test -f /tmp/server-image.txt || ./hack/get-server-image.sh /tmp/server-image.txt
 	export KOSLI_SERVER_IMAGE=$$(cat /tmp/server-image.txt) && ./bin/reset-or-start-server.sh force
 
 test_integration: deps vet ensure_network test_setup ## Run tests except the too slow ones
diff --git a/cmd/kosli/attestJira.go b/cmd/kosli/attestJira.go
index baddf69c8..13170840c 100644
--- a/cmd/kosli/attestJira.go
+++ b/cmd/kosli/attestJira.go
@@ -329,7 +329,10 @@ func (o *attestJiraOptions) run(args []string) error {
 }
 
 func (o *attestJiraOptions) validateJiraProjectKeys() error {
-	matchesJiraProjectKeys, err := regexp.Compile("^[A-Z][A-Z0-9]{1,9}$")
+	// According to Jira documentation https://confluence.atlassian.com/adminjiraserver/changing-the-project-key-format-938847081.html
+	// the Jira project key has to start with a capital letter and can then have capital letters numbers and underscore.
+	// But Jira itself will accept lower case letters when searching a repository for matching branches and commits
+	matchesJiraProjectKeys, err := regexp.Compile("^[A-Za-z][A-Za-z0-9_]{1,9}$")
 	if err != nil {
 		return err
 	}
diff --git a/cmd/kosli/attestJira_test.go b/cmd/kosli/attestJira_test.go
index 8bfafeec6..4f95e1190 100644
--- a/cmd/kosli/attestJira_test.go
+++ b/cmd/kosli/attestJira_test.go
@@ -248,15 +248,28 @@ func (suite *AttestJiraCommandTestSuite) TestAttestJiraCmd() {
 				commitMessage: "EX-1 test commit",
 			},
 		},
+		{
+			name: "can specify lower case and underscore jira project key",
+			cmd: fmt.Sprintf(`attest jira --name bar 
+					--jira-base-url https://kosli-test.atlassian.net  --jira-username tore@kosli.com
+					--jira-project-key low
+					--jira-project-key A99
+					--jira-project-key A_99
+					--repo-root %s %s`, suite.tmpDir, suite.defaultKosliArguments),
+			golden: "jira attestation 'bar' is reported to trail: test-123\n",
+			additionalConfig: jiraTestsAdditionalConfig{
+				commitMessage: "low-1 test commit",
+			},
+		},
 		{
 			wantError: true,
 			name:      "fails with an invalid Jira project key specified",
-			cmd: fmt.Sprintf(`attest jira --name bar 
+			cmd: fmt.Sprintf(`attest jira --name bar
 					--jira-base-url https://kosli-test.atlassian.net  --jira-username tore@kosli.com
-					--jira-project-key ex
 					--jira-project-key 1AB
+					--jira-project-key AB-44
 					--repo-root %s %s`, suite.tmpDir, suite.defaultKosliArguments),
-			golden: "Error: Invalid Jira project keys: ex, 1AB\n",
+			golden: "Error: Invalid Jira project keys: 1AB, AB-44\n",
 			additionalConfig: jiraTestsAdditionalConfig{
 				commitMessage: "EX-1 test commit",
 			},
diff --git a/hack/get-server-image.sh b/hack/get-server-image.sh
index 4950cdb36..91715ca3d 100755
--- a/hack/get-server-image.sh
+++ b/hack/get-server-image.sh
@@ -1,6 +1,13 @@
 #!/bin/bash
 set -uo pipefail
 
+if [ $# -lt 1 ]; then
+  echo "Output result file is missing" >&2
+  exit 1
+fi
+
+OUTPUT_FILE=$1; shift
+
 # Check that jq is installed
 if ! command -v jq &> /dev/null; then
   echo "❌ Error: 'jq' is not installed. Please install it:" >&2
@@ -29,4 +36,4 @@ echo "$json" | jq -r '
   | select(.name | test("merkely:"))
   | select(.annotation.type != "exited")
   | "\(.name | sub(":.*"; ""))@sha256:\(.fingerprint)"
-'
\ No newline at end of file
+' > ${OUTPUT_FILE}