diff --git a/Cargo.lock b/Cargo.lock
index f4ae671..75a2e80 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -697,7 +697,7 @@ checksum = "3e2e65a1a2e43cfcb47a895c4c8b10d1f4a61097f9f254f183aee60cad9c651d"
 
 [[package]]
 name = "marine-build-rs-generator"
-version = "0.8.0"
+version = "0.8.1"
 dependencies = [
  "marine-test-macro-impl",
 ]
@@ -883,7 +883,7 @@ dependencies = [
 
 [[package]]
 name = "marine-rs-sdk-test"
-version = "0.8.0"
+version = "0.8.1"
 dependencies = [
  "fluence-app-service",
  "marine-build-rs-generator",
@@ -924,7 +924,7 @@ dependencies = [
 
 [[package]]
 name = "marine-test-macro"
-version = "0.8.0"
+version = "0.8.1"
 dependencies = [
  "marine-test-macro-impl",
  "proc-macro-error",
@@ -935,7 +935,7 @@ dependencies = [
 
 [[package]]
 name = "marine-test-macro-impl"
-version = "0.8.0"
+version = "0.8.1"
 dependencies = [
  "darling",
  "fluence-app-service",
diff --git a/Cargo.toml b/Cargo.toml
index a7a5d0e..4eeef60 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "marine-rs-sdk-test"
-version = "0.8.0"
+version = "0.8.1"
 description = "Backend SDK that allows testing modules for the Marine runtime"
 documentation = "https://docs.rs/marine-rs-sdk-test"
 repository = "https://github.com/fluencelabs/marine-rs-sdk-test"
@@ -21,8 +21,8 @@ doctest = false
 trybuild = "1.0"
 
 [dependencies]
-marine-test-macro = { path = "crates/marine-test-macro", version = "=0.8.0" }
-marine-build-rs-generator = { path = "crates/marine-build-rs-generator", version = "=0.8.0" }
+marine-test-macro = { path = "crates/marine-test-macro", version = "=0.8.1" }
+marine-build-rs-generator = { path = "crates/marine-build-rs-generator", version = "=0.8.1" }
 fluence-app-service = { version = "0.22.1", features = ["raw-module-api"] }
 
 serde = { version = "1.0.144", features = ["derive"] }
diff --git a/crates/marine-build-rs-generator/Cargo.toml b/crates/marine-build-rs-generator/Cargo.toml
index 5550ff2..47619d3 100644
--- a/crates/marine-build-rs-generator/Cargo.toml
+++ b/crates/marine-build-rs-generator/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "marine-build-rs-generator"
-version = "0.8.0"
+version = "0.8.1"
 edition = "2018"
 description = "Tools for generating marine_test_env in build scripts"
 documentation = "https://docs.rs/marine-build-rs-generator"
@@ -17,4 +17,4 @@ all-features = true
 doctest = false
 
 [dependencies]
-marine-test-macro-impl = { path = "../marine-test-macro-impl", version = "=0.8.0" }
+marine-test-macro-impl = { path = "../marine-test-macro-impl", version = "=0.8.1" }
diff --git a/crates/marine-build-rs-generator/src/lib.rs b/crates/marine-build-rs-generator/src/lib.rs
index c9bfa7d..4218a04 100644
--- a/crates/marine-build-rs-generator/src/lib.rs
+++ b/crates/marine-build-rs-generator/src/lib.rs
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-#![doc(html_root_url = "https://docs.rs/marine-build-rs-generator/0.8.0")]
+#![doc(html_root_url = "https://docs.rs/marine-build-rs-generator/0.8.1")]
 #![deny(
     dead_code,
     nonstandard_style,
diff --git a/crates/marine-test-macro-impl/Cargo.toml b/crates/marine-test-macro-impl/Cargo.toml
index cdf42f7..682c865 100644
--- a/crates/marine-test-macro-impl/Cargo.toml
+++ b/crates/marine-test-macro-impl/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "marine-test-macro-impl"
-version = "0.8.0"
+version = "0.8.1"
 edition = "2018"
 description = "Implementation of the `#[marine_test]` macro"
 documentation = "https://docs.rs/fluence/marine-test-macro-impl"
diff --git a/crates/marine-test-macro-impl/src/marine_test/token_stream_generator/service_generation_utils.rs b/crates/marine-test-macro-impl/src/marine_test/token_stream_generator/service_generation_utils.rs
index ccac3cd..704d395 100644
--- a/crates/marine-test-macro-impl/src/marine_test/token_stream_generator/service_generation_utils.rs
+++ b/crates/marine-test-macro-impl/src/marine_test/token_stream_generator/service_generation_utils.rs
@@ -65,7 +65,7 @@ pub(crate) fn generate_app_service_ctor(
         let mut __m_generated_marine_config = marine_rs_sdk_test::internal::TomlAppServiceConfig::load(&config_path)
             .unwrap_or_else(|e| panic!("app service config located at `{:?}` can't be loaded: {}", config_path, e));
         __m_generated_marine_config.service_base_dir = Some(tmp_dir);
-        __m_generated_marine_config.toml_marine_config.modules_dir = Some(modules_dir.to_string());
+        __m_generated_marine_config.toml_marine_config.modules_dir = Some(std::path::PathBuf::from(modules_dir));
 
         let marine = marine_rs_sdk_test::internal::AppService::new_with_empty_facade(__m_generated_marine_config, service_id, std::collections::HashMap::new())
             .unwrap_or_else(|e| panic!("app service can't be created: {}", e));
diff --git a/crates/marine-test-macro-impl/tests/generation_tests/empty_func/expanded.rs b/crates/marine-test-macro-impl/tests/generation_tests/empty_func/expanded.rs
index acb68f2..a7dc243 100644
--- a/crates/marine-test-macro-impl/tests/generation_tests/empty_func/expanded.rs
+++ b/crates/marine-test-macro-impl/tests/generation_tests/empty_func/expanded.rs
@@ -112,7 +112,7 @@ fn empty_string() {
             config_path, e
         ));
     __m_generated_marine_config.service_base_dir = Some(tmp_dir);
-    __m_generated_marine_config.toml_marine_config.modules_dir = Some(modules_dir.to_string());
+    __m_generated_marine_config.toml_marine_config.modules_dir = Some(std::path::PathBuf::from(modules_dir));
     let marine = marine_rs_sdk_test::internal::AppService::new_with_empty_facade(
         __m_generated_marine_config,
         service_id,
diff --git a/crates/marine-test-macro-impl/tests/generation_tests/mounted_binary/expanded.rs b/crates/marine-test-macro-impl/tests/generation_tests/mounted_binary/expanded.rs
index e87945f..69e0782 100644
--- a/crates/marine-test-macro-impl/tests/generation_tests/mounted_binary/expanded.rs
+++ b/crates/marine-test-macro-impl/tests/generation_tests/mounted_binary/expanded.rs
@@ -145,7 +145,7 @@ fn test() {
         )
     );
     __m_generated_marine_config.service_base_dir = Some(tmp_dir);
-    __m_generated_marine_config.toml_marine_config.modules_dir = Some(modules_dir.to_string());
+    __m_generated_marine_config.toml_marine_config.modules_dir = Some(std::path::PathBuf::from(modules_dir));
     let marine = marine_rs_sdk_test::internal::AppService::new_with_empty_facade(
         __m_generated_marine_config,
         service_id,
diff --git a/crates/marine-test-macro-impl/tests/generation_tests/multi-service-empty_mod/expanded.rs b/crates/marine-test-macro-impl/tests/generation_tests/multi-service-empty_mod/expanded.rs
index 4c7f6ff..70c4a18 100644
--- a/crates/marine-test-macro-impl/tests/generation_tests/multi-service-empty_mod/expanded.rs
+++ b/crates/marine-test-macro-impl/tests/generation_tests/multi-service-empty_mod/expanded.rs
@@ -215,7 +215,7 @@ pub mod tests {
                             );
                     __m_generated_marine_config.service_base_dir = Some(tmp_dir);
                     __m_generated_marine_config.toml_marine_config.modules_dir =
-                        Some(modules_dir.to_string());
+                        Some(std::path::PathBuf::from(modules_dir));
                     let marine = marine_rs_sdk_test::internal::AppService::new_with_empty_facade(
                         __m_generated_marine_config,
                         service_id,
diff --git a/crates/marine-test-macro-impl/tests/generation_tests/multi-service-multiple/expanded.rs b/crates/marine-test-macro-impl/tests/generation_tests/multi-service-multiple/expanded.rs
index d854801..fc5ef57 100644
--- a/crates/marine-test-macro-impl/tests/generation_tests/multi-service-multiple/expanded.rs
+++ b/crates/marine-test-macro-impl/tests/generation_tests/multi-service-multiple/expanded.rs
@@ -215,7 +215,7 @@ fn test() {
                             );
                     __m_generated_marine_config.service_base_dir = Some(tmp_dir);
                     __m_generated_marine_config.toml_marine_config.modules_dir =
-                        Some(modules_dir.to_string());
+                        Some(std::path::PathBuf::from(modules_dir));
                     let marine = marine_rs_sdk_test::internal::AppService::new_with_empty_facade(
                         __m_generated_marine_config,
                         service_id,
@@ -459,7 +459,7 @@ fn test() {
                             );
                     __m_generated_marine_config.service_base_dir = Some(tmp_dir);
                     __m_generated_marine_config.toml_marine_config.modules_dir =
-                        Some(modules_dir.to_string());
+                        Some(std::path::PathBuf::from(modules_dir));
                     let marine = marine_rs_sdk_test::internal::AppService::new_with_empty_facade(
                         __m_generated_marine_config,
                         service_id,
diff --git a/crates/marine-test-macro-impl/tests/generation_tests/multi-service-single/expanded.rs b/crates/marine-test-macro-impl/tests/generation_tests/multi-service-single/expanded.rs
index 83cf797..2af594c 100644
--- a/crates/marine-test-macro-impl/tests/generation_tests/multi-service-single/expanded.rs
+++ b/crates/marine-test-macro-impl/tests/generation_tests/multi-service-single/expanded.rs
@@ -215,7 +215,7 @@ fn empty_test() {
                             );
                     __m_generated_marine_config.service_base_dir = Some(tmp_dir);
                     __m_generated_marine_config.toml_marine_config.modules_dir =
-                        Some(modules_dir.to_string());
+                        Some(std::path::PathBuf::from(modules_dir));
                     let marine = marine_rs_sdk_test::internal::AppService::new_with_empty_facade(
                         __m_generated_marine_config,
                         service_id,
diff --git a/crates/marine-test-macro-impl/tests/generation_tests/multiple_modules/expanded.rs b/crates/marine-test-macro-impl/tests/generation_tests/multiple_modules/expanded.rs
index a4c3af1..a220d7f 100644
--- a/crates/marine-test-macro-impl/tests/generation_tests/multiple_modules/expanded.rs
+++ b/crates/marine-test-macro-impl/tests/generation_tests/multiple_modules/expanded.rs
@@ -264,7 +264,7 @@ fn empty_string() {
         )
     );
     __m_generated_marine_config.service_base_dir = Some(tmp_dir);
-    __m_generated_marine_config.toml_marine_config.modules_dir = Some(modules_dir.to_string());
+    __m_generated_marine_config.toml_marine_config.modules_dir = Some(std::path::PathBuf::from(modules_dir));
     let marine = marine_rs_sdk_test::internal::AppService::new_with_empty_facade(
         __m_generated_marine_config,
         service_id,
diff --git a/crates/marine-test-macro/Cargo.toml b/crates/marine-test-macro/Cargo.toml
index 8c452f5..15d5334 100644
--- a/crates/marine-test-macro/Cargo.toml
+++ b/crates/marine-test-macro/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "marine-test-macro"
-version = "0.8.0"
+version = "0.8.1"
 edition = "2018"
 description = "Definition of the `#[marine_test]` macro"
 documentation = "https://docs.rs/fluence/marine-test-macro"
@@ -18,7 +18,7 @@ proc-macro = true
 doctest = false
 
 [dependencies]
-marine-test-macro-impl = { path = "../marine-test-macro-impl", version = "=0.8.0" }
+marine-test-macro-impl = { path = "../marine-test-macro-impl", version = "=0.8.1" }
 
 quote = "1.0.21"
 proc-macro2 = "1.0.43"
diff --git a/crates/marine-test-macro/src/lib.rs b/crates/marine-test-macro/src/lib.rs
index 3e38299..f644d8e 100644
--- a/crates/marine-test-macro/src/lib.rs
+++ b/crates/marine-test-macro/src/lib.rs
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-#![doc(html_root_url = "https://docs.rs/marine-test-macro/0.8.0")]
+#![doc(html_root_url = "https://docs.rs/marine-test-macro/0.8.1")]
 #![deny(
     dead_code,
     nonstandard_style,
diff --git a/src/lib.rs b/src/lib.rs
index 3bc3701..384c791 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-#![doc(html_root_url = "https://docs.rs/marine-rs-sdk-test/0.8.0")]
+#![doc(html_root_url = "https://docs.rs/marine-rs-sdk-test/0.8.1")]
 #![deny(
     dead_code,
     nonstandard_style,