diff --git a/Cargo.toml b/Cargo.toml
index 3fec9e5..9479daa 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -37,7 +37,7 @@ java-properties = "1.4.1"
 java-rand = "0.2.0"
 
 [features]
-default = ["image"]
+default = []
 image = ["dep:image", "dep:imageproc"]
 allow_forced_iso_ied_18004_compliance = []
 svg_write = ["dep:svg"]
diff --git a/src/helpers.rs b/src/helpers.rs
index 9fa4982..2f9ae41 100644
--- a/src/helpers.rs
+++ b/src/helpers.rs
@@ -8,11 +8,14 @@ use std::{
 use crate::{
     common::{BitMatrix, HybridBinarizer},
     multi::{GenericMultipleBarcodeReader, MultipleBarcodeReader},
-    BarcodeFormat, BinaryBitmap, BufferedImageLuminanceSource, DecodeHintType, DecodeHintValue,
+    BarcodeFormat, BinaryBitmap, DecodeHintType, DecodeHintValue,
     DecodingHintDictionary, Exceptions, Luma8LuminanceSource, MultiFormatReader, RXingResult,
     Reader,
 };
 
+#[cfg(feature="image")]
+use crate::BufferedImageLuminanceSource;
+
 #[cfg(feature = "svg_read")]
 pub fn detect_in_svg(
     file_name: &str,
@@ -281,6 +284,8 @@ pub fn save_file(file_name: &str, bit_matrix: &BitMatrix) -> Result<(), Exceptio
         String::default()
     };
 
+    let _ = &ext;
+
     #[cfg(feature = "svg_write")]
     if ext == "svg" {
         return save_svg(file_name, bit_matrix);
diff --git a/src/multi/mod.rs b/src/multi/mod.rs
index 2fd6e66..db744d7 100644
--- a/src/multi/mod.rs
+++ b/src/multi/mod.rs
@@ -9,4 +9,5 @@ mod generic_multiple_barcode_reader;
 pub use generic_multiple_barcode_reader::*;
 
 #[cfg(test)]
+#[cfg(feature="image")]
 mod multi_test_case;
diff --git a/src/multi/qrcode/qr_code_multi_reader.rs b/src/multi/qrcode/qr_code_multi_reader.rs
index 65c9a06..8e5a5ad 100644
--- a/src/multi/qrcode/qr_code_multi_reader.rs
+++ b/src/multi/qrcode/qr_code_multi_reader.rs
@@ -205,6 +205,7 @@ fn compareRXingResult(a: &RXingResult, b: &RXingResult) -> Ordering {
 }
 
 #[cfg(test)]
+#[cfg(feature="image")]
 mod multi_qr_code_test_case {
     /*
      * Copyright 2016 ZXing authors
diff --git a/src/oned/rss/expanded/mod.rs b/src/oned/rss/expanded/mod.rs
index e0d287f..a4a89b8 100644
--- a/src/oned/rss/expanded/mod.rs
+++ b/src/oned/rss/expanded/mod.rs
@@ -16,19 +16,25 @@ mod rss_expanded_reader;
 pub use rss_expanded_reader::*;
 
 #[cfg(test)]
+#[cfg(feature="image")]
 mod rss_expanded_internal_test_case;
 
 #[cfg(test)]
+#[cfg(feature="image")]
 mod rss_expanded_image_2_binary_test_tase;
 
 #[cfg(test)]
+#[cfg(feature="image")]
 mod rss_expanded_image_2_result_test_case;
 
 #[cfg(test)]
+#[cfg(feature="image")]
 mod rss_expanded_image_2_string_test_case;
 
 #[cfg(test)]
+#[cfg(feature="image")]
 mod rss_expanded_stacked_internal_test_case;
 
 #[cfg(test)]
+#[cfg(feature="image")]
 mod test_case_util;
diff --git a/src/qrcode/mod.rs b/src/qrcode/mod.rs
index c41b97f..2371ff1 100644
--- a/src/qrcode/mod.rs
+++ b/src/qrcode/mod.rs
@@ -9,4 +9,5 @@ mod qr_code_writer;
 pub use qr_code_writer::*;
 
 #[cfg(test)]
+#[cfg(feature="image")]
 mod QRCodeWriterTestCase;