diff --git a/signer/tuf_on_ci_sign/_user.py b/signer/tuf_on_ci_sign/_user.py
index 46a8f68..28de8d2 100644
--- a/signer/tuf_on_ci_sign/_user.py
+++ b/signer/tuf_on_ci_sign/_user.py
@@ -38,7 +38,7 @@ def __init__(self, path: str):
         if not self._config:
             raise click.ClickException(f"Settings file {path} not found")
         try:
-            self.name = self._config["settings"]["user-name"]
+            self.name = self._config["settings"]["user-name"].lower()
             if not self.name.startswith("@"):
                 self.name = f"@{self.name}"
             self.push_remote = self._config["settings"]["push-remote"]
diff --git a/signer/tuf_on_ci_sign/delegate.py b/signer/tuf_on_ci_sign/delegate.py
index 8080a47..8ac2244 100755
--- a/signer/tuf_on_ci_sign/delegate.py
+++ b/signer/tuf_on_ci_sign/delegate.py
@@ -63,7 +63,7 @@ def verify_signers(response: str) -> list[str]:
 
         signers: list[str] = []
         for s in response.split(","):
-            s = s.strip()
+            s = s.strip().lower()
             if not s.startswith("@"):
                 s = f"@{s}"
 
diff --git a/tests/e2e.sh b/tests/e2e.sh
index ef3e7c9..02bc27e 100755
--- a/tests/e2e.sh
+++ b/tests/e2e.sh
@@ -97,14 +97,14 @@ repo_setup()
 signer_setup()
 {
     USER=$1
-    SIGNER_DIR="$WORK_DIR/$TEST_NAME/$USER"
+    SIGNER_DIR="$WORK_DIR/$TEST_NAME/${USER,,}"
     SIGNER_GIT="$SIGNER_DIR/git"
 
     mkdir -p $SIGNER_GIT
 
     # initialize softhsm: Make it look like we have HW key attached
     echo "directories.tokendir = $SIGNER_DIR/tokens" > "$SIGNER_DIR/softhsm2.conf"
-    cp -r $SCRIPT_DIR/softhsm/tokens-$USER $SIGNER_DIR/tokens
+    cp -r "$SCRIPT_DIR/softhsm/tokens-${USER,,}" $SIGNER_DIR/tokens
 
     # clone the test repository
     git_clone $SIGNER_GIT $UPSTREAM_GIT "$USER@example.com" "$USER"
@@ -123,7 +123,7 @@ signer_init()
     USER=$1
     EVENT=$2
 
-    SIGNER_DIR="$WORK_DIR/$TEST_NAME/$USER"
+    SIGNER_DIR="$WORK_DIR/$TEST_NAME/${USER,,}"
     SIGNER_GIT="$SIGNER_DIR/git"
     export SOFTHSM2_CONF="$SIGNER_DIR/softhsm2.conf"
 
@@ -153,7 +153,7 @@ signer_add_delegation()
     USER1=$1
     EVENT=$2
 
-    SIGNER_DIR="$WORK_DIR/$TEST_NAME/$USER1"
+    SIGNER_DIR="$WORK_DIR/$TEST_NAME/${USER1,,}"
     SIGNER_GIT="$SIGNER_DIR/git"
     export SOFTHSM2_CONF="$SIGNER_DIR/softhsm2.conf"
 
@@ -184,7 +184,7 @@ signer_change_root_signer()
     USER2=$2
     EVENT=$3
 
-    SIGNER_DIR="$WORK_DIR/$TEST_NAME/$USER1"
+    SIGNER_DIR="$WORK_DIR/$TEST_NAME/${USER1,,}"
     SIGNER_GIT="$SIGNER_DIR/git"
     export SOFTHSM2_CONF="$SIGNER_DIR/softhsm2.conf"
 
@@ -211,7 +211,7 @@ signer_init_shorter_snapshot_expiry()
     USER=$1
     EVENT=$2
 
-    SIGNER_DIR="$WORK_DIR/$TEST_NAME/$USER"
+    SIGNER_DIR="$WORK_DIR/$TEST_NAME/${USER,,}"
     SIGNER_GIT="$SIGNER_DIR/git"
     export SOFTHSM2_CONF="$SIGNER_DIR/softhsm2.conf"
 
@@ -244,7 +244,7 @@ signer_init_offline_roles_in_signing_period()
     USER=$1
     EVENT=$2
 
-    SIGNER_DIR="$WORK_DIR/$TEST_NAME/$USER"
+    SIGNER_DIR="$WORK_DIR/$TEST_NAME/${USER,,}"
     SIGNER_GIT="$SIGNER_DIR/git"
     export SOFTHSM2_CONF="$SIGNER_DIR/softhsm2.conf"
 
@@ -280,7 +280,7 @@ signer_init_multiuser()
     USER=$1
     EVENT=$2
 
-    SIGNER_DIR="$WORK_DIR/$TEST_NAME/$USER"
+    SIGNER_DIR="$WORK_DIR/$TEST_NAME/${USER,,}"
     SIGNER_GIT="$SIGNER_DIR/git"
     export SOFTHSM2_CONF="$SIGNER_DIR/softhsm2.conf"
 
@@ -288,7 +288,7 @@ signer_init_multiuser()
         ""                  # Configure root? [enter to continue]
         "1"                 # Configure targets? [1: configure signers]
         "1"                 # Chose offline signer
-        "@tuf-on-ci-user1, @tuf-on-ci-user2" # Enter signers
+        "@tuf-on-ci-user1, @tuf-on-ci-User2" # Enter signers
         "2"                 # Enter threshold
         ""                  # Configure targets? [enter to continue]
         "1"                 # Configure online roles? [1: configure key]
@@ -313,7 +313,7 @@ signer_accept_invite()
     USER=$1
     EVENT=$2
 
-    SIGNER_DIR="$WORK_DIR/$TEST_NAME/$USER"
+    SIGNER_DIR="$WORK_DIR/$TEST_NAME/${USER,,}"
     SIGNER_GIT="$SIGNER_DIR/git"
     export SOFTHSM2_CONF="$SIGNER_DIR/softhsm2.conf"
 
@@ -339,7 +339,7 @@ signer_sign()
 
     EVENT=$2
 
-    SIGNER_DIR="$WORK_DIR/$TEST_NAME/$USER"
+    SIGNER_DIR="$WORK_DIR/$TEST_NAME/${USER,,}"
     SIGNER_GIT="$SIGNER_DIR/git"
     export SOFTHSM2_CONF="$SIGNER_DIR/softhsm2.conf"
 
@@ -360,7 +360,7 @@ signer_add_targets()
     USER=$1
     EVENT=$2
 
-    SIGNER_DIR="$WORK_DIR/$TEST_NAME/$USER"
+    SIGNER_DIR="$WORK_DIR/$TEST_NAME/${USER,,}"
     SIGNER_GIT="$SIGNER_DIR/git"
     export SOFTHSM2_CONF="$SIGNER_DIR/softhsm2.conf"
 
@@ -382,7 +382,7 @@ signer_modify_targets()
     USER=$1
     EVENT=$2
 
-    SIGNER_DIR="$WORK_DIR/$TEST_NAME/$USER"
+    SIGNER_DIR="$WORK_DIR/$TEST_NAME/${USER,,}"
     SIGNER_GIT="$SIGNER_DIR/git"
     export SOFTHSM2_CONF="$SIGNER_DIR/softhsm2.conf"
 
@@ -403,7 +403,7 @@ signer_add_delegated_targets()
     USER=$1
     EVENT=$2
 
-    SIGNER_DIR="$WORK_DIR/$TEST_NAME/$USER"
+    SIGNER_DIR="$WORK_DIR/$TEST_NAME/${USER,,}"
     SIGNER_GIT="$SIGNER_DIR/git"
     export SOFTHSM2_CONF="$SIGNER_DIR/softhsm2.conf"
 
@@ -427,7 +427,7 @@ non_signer_change_online_delegation()
     USER=$1
     EVENT=$2
 
-    SIGNER_DIR="$WORK_DIR/$TEST_NAME/$USER"
+    SIGNER_DIR="$WORK_DIR/$TEST_NAME/${USER,,}"
     SIGNER_GIT="$SIGNER_DIR/git"
     export SOFTHSM2_CONF="$SIGNER_DIR/softhsm2.conf"
 
@@ -551,7 +551,7 @@ setup_test() {
     mkdir -p $REPO_GIT $UPSTREAM_GIT $PUBLISH_DIR
 
     repo_setup
-    signer_setup "user1"
+    signer_setup "User1"
     signer_setup "user2"
 }