diff --git a/src/main/java/fr/ariouz/gkit/build/image/arg/NativeBuildArgParser.java b/src/main/java/fr/ariouz/gkit/build/image/arg/NativeBuildArgParser.java
index 27bfc2e..4e149c4 100644
--- a/src/main/java/fr/ariouz/gkit/build/image/arg/NativeBuildArgParser.java
+++ b/src/main/java/fr/ariouz/gkit/build/image/arg/NativeBuildArgParser.java
@@ -1,5 +1,6 @@
 package fr.ariouz.gkit.build.image.arg;
 
+import fr.ariouz.gkit.config.ConfigException;
 import fr.ariouz.gkit.config.models.NativeConfig;
 
 import java.util.ArrayList;
@@ -12,6 +13,7 @@ public class NativeBuildArgParser {
 	public NativeBuildArgParser() {}
 
 	public List<String> parseBuildArgs(NativeConfig config) {
+        if (config == null) throw new ConfigException("Native config is null");
 		List<NormalizedArg> normalizedArgs = normalize(config.getBuildArgs());
 		normalizedArgs.sort(Comparator.comparing(NormalizedArg::arg));
 		return renderArgs(normalizedArgs);
diff --git a/src/test/java/fr/ariouz/gkit/test/build/image/NativeBuildArgParserTest.java b/src/test/java/fr/ariouz/gkit/test/build/image/NativeBuildArgParserTest.java
new file mode 100644
index 0000000..ded452d
--- /dev/null
+++ b/src/test/java/fr/ariouz/gkit/test/build/image/NativeBuildArgParserTest.java
@@ -0,0 +1,32 @@
+package fr.ariouz.gkit.test.build.image;
+
+import fr.ariouz.gkit.build.image.arg.NativeBuildArg;
+import fr.ariouz.gkit.build.image.arg.NativeBuildArgParser;
+import fr.ariouz.gkit.config.models.NativeConfig;
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+import java.util.Map;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class NativeBuildArgParserTest {
+
+
+    @Test
+    void parseBuildArgs_isValid() {
+        NativeConfig nativeConfig = new NativeConfig();
+        nativeConfig.setBuildArgs(List.of(
+                Map.of(NativeBuildArg.FALLBACK_IMAGE.getConfigKey(), false),
+                Map.of(NativeBuildArg.OPTIMIZATION_LEVEL.getConfigKey(), 2)
+        ));
+
+        List<String> args = new NativeBuildArgParser()
+                .parseBuildArgs(nativeConfig);
+
+        assertThat(args).containsExactly(
+                "--no-fallback",
+                "-O2"
+        );
+    }
+}