diff --git a/.github/workflows/e2e.yml b/.github/workflows/e2e.yml
index 893ae9b..28ee123 100644
--- a/.github/workflows/e2e.yml
+++ b/.github/workflows/e2e.yml
@@ -237,7 +237,7 @@ jobs:
         ./tests/e2e/${{ matrix.test }}.sh
       env:
         # Use a unique root directory for each test run
-        TX3_ROOT_DIR: ${{ github.workspace }}/test-root-${{ matrix.os }}-${{ matrix.arch }}-${{ matrix.test }}
+        TX3_ROOT: ${{ github.workspace }}/test-root-${{ matrix.os }}-${{ matrix.arch }}-${{ matrix.test }}
         TX3_CHANNEL: ${{ inputs.test_channel }}
     
     - name: Upload test artifacts on failure
diff --git a/tests/e2e/fresh_install.sh b/tests/e2e/fresh_install.sh
index 9a551cc..8969f79 100755
--- a/tests/e2e/fresh_install.sh
+++ b/tests/e2e/fresh_install.sh
@@ -14,11 +14,11 @@ NC='\033[0m' # No Color
 # Test configuration
 TEST_NAME="fresh_install"
 TEMP_DIR=$(mktemp -d)
-export TX3_ROOT_DIR="$TEMP_DIR/tx3_test"
+export TX3_ROOT="$TEMP_DIR/tx3_test"
 export TX3_CHANNEL="${TX3_CHANNEL:-stable}"
 
 echo -e "${YELLOW}Starting $TEST_NAME test...${NC}"
-echo "TX3_ROOT_DIR: $TX3_ROOT_DIR"
+echo "TX3_ROOT: $TX3_ROOT"
 echo "TX3_CHANNEL: $TX3_CHANNEL"
 echo "Temp directory: $TEMP_DIR"
 
@@ -76,11 +76,11 @@ main() {
     echo -e "${YELLOW}Step 1: Verifying clean state${NC}"
     
     # Ensure the root directory doesn't exist initially
-    if [[ -e "$TX3_ROOT_DIR" ]]; then
-        echo -e "${RED}✗ TX3_ROOT_DIR already exists, not a fresh install${NC}"
+    if [[ -e "$TX3_ROOT" ]]; then
+        echo -e "${RED}✗ TX3_ROOT already exists, not a fresh install${NC}"
         exit 1
     fi
-    echo -e "${GREEN}✓ Clean state verified - TX3_ROOT_DIR does not exist${NC}"
+    echo -e "${GREEN}✓ Clean state verified - TX3_ROOT does not exist${NC}"
     
     echo -e "${YELLOW}Step 2: Running tx3up install${NC}"
     
@@ -95,25 +95,25 @@ main() {
     echo -e "${YELLOW}Step 3: Verifying installation artifacts${NC}"
     
     # Check if the root directory was created
-    check_directory "$TX3_ROOT_DIR" "TX3 root directory"
+    check_directory "$TX3_ROOT" "TX3 root directory"
     
     # Check if the channel directory exists
-    check_directory "$TX3_ROOT_DIR/$TX3_CHANNEL" "Channel directory ($TX3_CHANNEL)"
+    check_directory "$TX3_ROOT/$TX3_CHANNEL" "Channel directory ($TX3_CHANNEL)"
     
     # Check if the bin directory exists
-    check_directory "$TX3_ROOT_DIR/$TX3_CHANNEL/bin" "Binary directory"
+    check_directory "$TX3_ROOT/$TX3_CHANNEL/bin" "Binary directory"
     
     # Check if manifest file exists
-    check_file "$TX3_ROOT_DIR/$TX3_CHANNEL/manifest.json" "Manifest file"
+    check_file "$TX3_ROOT/$TX3_CHANNEL/manifest.json" "Manifest file"
     
     echo -e "${YELLOW}Step 4: Verifying installation contents${NC}"
     
     # List the contents of the installation for debugging
     echo "Installation directory contents:"
-    find "$TX3_ROOT_DIR" -type f -exec ls -la {} \; 2>/dev/null || true
+    find "$TX3_ROOT" -type f -exec ls -la {} \; 2>/dev/null || true
     
     # Check if at least one binary was installed
-    bin_count=$(find "$TX3_ROOT_DIR/$TX3_CHANNEL/bin" -type f -executable 2>/dev/null | wc -l)
+    bin_count=$(find "$TX3_ROOT/$TX3_CHANNEL/bin" -type f -executable 2>/dev/null | wc -l)
     if [[ $bin_count -gt 0 ]]; then
         echo -e "${GREEN}✓ Found $bin_count executable binaries in bin directory${NC}"
     else
@@ -125,7 +125,7 @@ main() {
     
     # Verify the manifest file is valid JSON
     if command -v jq >/dev/null 2>&1; then
-        if jq empty "$TX3_ROOT_DIR/$TX3_CHANNEL/manifest.json" 2>/dev/null; then
+        if jq empty "$TX3_ROOT/$TX3_CHANNEL/manifest.json" 2>/dev/null; then
             echo -e "${GREEN}✓ Manifest file is valid JSON${NC}"
         else
             echo -e "${RED}✗ Manifest file is not valid JSON${NC}"
@@ -133,7 +133,7 @@ main() {
         fi
     else
         # Basic JSON validation without jq
-        if grep -q '^\s*{' "$TX3_ROOT_DIR/$TX3_CHANNEL/manifest.json" && grep -q '}\s*$' "$TX3_ROOT_DIR/$TX3_CHANNEL/manifest.json"; then
+        if grep -q '^\s*{' "$TX3_ROOT/$TX3_CHANNEL/manifest.json" && grep -q '}\s*$' "$TX3_ROOT/$TX3_CHANNEL/manifest.json"; then
             echo -e "${GREEN}✓ Manifest file appears to be JSON (basic check)${NC}"
         else
             echo -e "${RED}✗ Manifest file does not appear to be valid JSON${NC}"
@@ -143,11 +143,11 @@ main() {
     
     echo -e "${GREEN}🎉 Fresh install test completed successfully!${NC}"
     echo -e "${GREEN}All installation artifacts verified:${NC}"
-    echo -e "${GREEN}  - Root directory: $TX3_ROOT_DIR${NC}"
+    echo -e "${GREEN}  - Root directory: $TX3_ROOT${NC}"
     echo -e "${GREEN}  - Channel: $TX3_CHANNEL${NC}"
-    echo -e "${GREEN}  - Channel directory: $TX3_ROOT_DIR/$TX3_CHANNEL${NC}"
-    echo -e "${GREEN}  - Binary directory: $TX3_ROOT_DIR/$TX3_CHANNEL/bin${NC}"
-    echo -e "${GREEN}  - Manifest file: $TX3_ROOT_DIR/$TX3_CHANNEL/manifest.json${NC}"
+    echo -e "${GREEN}  - Channel directory: $TX3_ROOT/$TX3_CHANNEL${NC}"
+    echo -e "${GREEN}  - Binary directory: $TX3_ROOT/$TX3_CHANNEL/bin${NC}"
+    echo -e "${GREEN}  - Manifest file: $TX3_ROOT/$TX3_CHANNEL/manifest.json${NC}"
     echo -e "${GREEN}  - Executable binaries: $bin_count${NC}"
 }
 
diff --git a/tests/e2e/update_install.sh b/tests/e2e/update_install.sh
index 6e83e9c..3784144 100755
--- a/tests/e2e/update_install.sh
+++ b/tests/e2e/update_install.sh
@@ -14,11 +14,11 @@ NC='\033[0m' # No Color
 # Test configuration
 TEST_NAME="update_install"
 TEMP_DIR=$(mktemp -d)
-export TX3_ROOT_DIR="$TEMP_DIR/tx3_test"
+export TX3_ROOT="$TEMP_DIR/tx3_test"
 export TX3_CHANNEL="${TX3_CHANNEL:-stable}"
 
 echo -e "${YELLOW}Starting $TEST_NAME test...${NC}"
-echo "TX3_ROOT_DIR: $TX3_ROOT_DIR"
+echo "TX3_ROOT: $TX3_ROOT"
 echo "TX3_CHANNEL: $TX3_CHANNEL"
 echo "Temp directory: $TEMP_DIR"
 
@@ -96,8 +96,8 @@ main() {
     echo -e "${YELLOW}Step 1: Performing initial installation${NC}"
     
     # Ensure clean state
-    if [[ -e "$TX3_ROOT_DIR" ]]; then
-        rm -rf "$TX3_ROOT_DIR"
+    if [[ -e "$TX3_ROOT" ]]; then
+        rm -rf "$TX3_ROOT"
     fi
     
     # Run initial installation
@@ -109,22 +109,22 @@ main() {
     echo -e "${GREEN}✓ Initial installation completed${NC}"
     
     # Verify initial installation
-    check_directory "$TX3_ROOT_DIR" "TX3 root directory"
-    check_directory "$TX3_ROOT_DIR/$TX3_CHANNEL" "Channel directory ($TX3_CHANNEL)"
-    check_directory "$TX3_ROOT_DIR/$TX3_CHANNEL/bin" "Binary directory"
-    check_file "$TX3_ROOT_DIR/$TX3_CHANNEL/manifest.json" "Manifest file"
+    check_directory "$TX3_ROOT" "TX3 root directory"
+    check_directory "$TX3_ROOT/$TX3_CHANNEL" "Channel directory ($TX3_CHANNEL)"
+    check_directory "$TX3_ROOT/$TX3_CHANNEL/bin" "Binary directory"
+    check_file "$TX3_ROOT/$TX3_CHANNEL/manifest.json" "Manifest file"
     
     echo -e "${YELLOW}Step 2: Recording initial state${NC}"
     
     # Record initial state
-    initial_manifest_mtime=$(get_file_mtime "$TX3_ROOT_DIR/$TX3_CHANNEL/manifest.json")
-    initial_bin_count=$(count_files "$TX3_ROOT_DIR/$TX3_CHANNEL/bin")
+    initial_manifest_mtime=$(get_file_mtime "$TX3_ROOT/$TX3_CHANNEL/manifest.json")
+    initial_bin_count=$(count_files "$TX3_ROOT/$TX3_CHANNEL/bin")
     
     echo "Initial manifest mtime: $initial_manifest_mtime"
     echo "Initial binary count: $initial_bin_count"
     
     # Create a test marker file to verify update behavior
-    test_marker="$TX3_ROOT_DIR/test_marker.txt"
+    test_marker="$TX3_ROOT/test_marker.txt"
     echo "test_marker_$(date +%s)" > "$test_marker"
     
     # Wait a moment to ensure different timestamps
@@ -143,10 +143,10 @@ main() {
     echo -e "${YELLOW}Step 4: Verifying update behavior${NC}"
     
     # Verify installation still exists and is functional
-    check_directory "$TX3_ROOT_DIR" "TX3 root directory (after update)"
-    check_directory "$TX3_ROOT_DIR/$TX3_CHANNEL" "Channel directory (after update)"
-    check_directory "$TX3_ROOT_DIR/$TX3_CHANNEL/bin" "Binary directory (after update)"
-    check_file "$TX3_ROOT_DIR/$TX3_CHANNEL/manifest.json" "Manifest file (after update)"
+    check_directory "$TX3_ROOT" "TX3 root directory (after update)"
+    check_directory "$TX3_ROOT/$TX3_CHANNEL" "Channel directory (after update)"
+    check_directory "$TX3_ROOT/$TX3_CHANNEL/bin" "Binary directory (after update)"
+    check_file "$TX3_ROOT/$TX3_CHANNEL/manifest.json" "Manifest file (after update)"
     
     # Check if our test marker still exists (should be preserved during update)
     if [[ -f "$test_marker" ]]; then
@@ -156,8 +156,8 @@ main() {
     fi
     
     # Record post-update state
-    updated_manifest_mtime=$(get_file_mtime "$TX3_ROOT_DIR/$TX3_CHANNEL/manifest.json")
-    updated_bin_count=$(count_files "$TX3_ROOT_DIR/$TX3_CHANNEL/bin")
+    updated_manifest_mtime=$(get_file_mtime "$TX3_ROOT/$TX3_CHANNEL/manifest.json")
+    updated_bin_count=$(count_files "$TX3_ROOT/$TX3_CHANNEL/bin")
     
     echo "Updated manifest mtime: $updated_manifest_mtime"
     echo "Updated binary count: $updated_bin_count"
@@ -181,7 +181,7 @@ main() {
     fi
     
     # Verify that at least some binaries are still executable
-    executable_count=$(find "$TX3_ROOT_DIR/$TX3_CHANNEL/bin" -type f -executable 2>/dev/null | wc -l)
+    executable_count=$(find "$TX3_ROOT/$TX3_CHANNEL/bin" -type f -executable 2>/dev/null | wc -l)
     if [[ $executable_count -gt 0 ]]; then
         echo -e "${GREEN}✓ Found $executable_count executable binaries after update${NC}"
     else
@@ -198,8 +198,8 @@ main() {
     fi
     
     # Verify installation is still intact
-    final_manifest_mtime=$(get_file_mtime "$TX3_ROOT_DIR/$TX3_CHANNEL/manifest.json")
-    final_bin_count=$(count_files "$TX3_ROOT_DIR/$TX3_CHANNEL/bin")
+    final_manifest_mtime=$(get_file_mtime "$TX3_ROOT/$TX3_CHANNEL/manifest.json")
+    final_bin_count=$(count_files "$TX3_ROOT/$TX3_CHANNEL/bin")
     
     if [[ $final_bin_count -eq $updated_bin_count ]]; then
         echo -e "${GREEN}✓ Idempotency test passed - binary count unchanged${NC}"
@@ -212,7 +212,7 @@ main() {
     echo -e "${GREEN}  - Initial binary count: $initial_bin_count${NC}"
     echo -e "${GREEN}  - Updated binary count: $updated_bin_count${NC}"
     echo -e "${GREEN}  - Final binary count: $final_bin_count${NC}"
-    echo -e "${GREEN}  - Installation directory: $TX3_ROOT_DIR${NC}"
+    echo -e "${GREEN}  - Installation directory: $TX3_ROOT${NC}"
     echo -e "${GREEN}  - Manifest updates: $initial_manifest_mtime → $updated_manifest_mtime → $final_manifest_mtime${NC}"
 }