diff --git a/src/aml.rs b/src/aml.rs
index 18f792e..d84cad0 100644
--- a/src/aml.rs
+++ b/src/aml.rs
@@ -1697,8 +1697,8 @@ impl<'a> Aml for PowerResource<'a> {
 
 #[cfg(test)]
 mod tests {
+    use alloc::borrow::ToOwned;
     use super::*;
-    use std::vec;
 
     #[test]
     fn test_device() {
diff --git a/src/bert.rs b/src/bert.rs
index e527fc3..2648038 100644
--- a/src/bert.rs
+++ b/src/bert.rs
@@ -62,6 +62,7 @@ aml_as_bytes!(BERT);
 
 #[cfg(test)]
 mod tests {
+    use alloc::vec::Vec;
     use super::*;
 
     #[test]
diff --git a/src/fadt.rs b/src/fadt.rs
index 3820995..1008b37 100644
--- a/src/fadt.rs
+++ b/src/fadt.rs
@@ -245,6 +245,7 @@ impl FADTBuilder {
 
 #[cfg(test)]
 mod test {
+    use alloc::vec::Vec;
     use super::{FADTBuilder, Flags, PmProfile};
     use crate::Aml;
 
diff --git a/src/hmat.rs b/src/hmat.rs
index 8c3baf6..5098132 100644
--- a/src/hmat.rs
+++ b/src/hmat.rs
@@ -357,7 +357,6 @@ impl Aml for MemorySideCache {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::Aml;
 
     fn check_checksum(hmat: &HMAT) {
         let mut bytes = Vec::new();
diff --git a/src/lib.rs b/src/lib.rs
index 1440480..91722e1 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -5,7 +5,7 @@
 //
 
 #![crate_type = "staticlib"]
-#![cfg_attr(not(test), no_std)]
+#![no_std]
 
 //! ACPI table generation.
 
diff --git a/src/madt.rs b/src/madt.rs
index edbc2be..a24eec4 100644
--- a/src/madt.rs
+++ b/src/madt.rs
@@ -649,7 +649,6 @@ aml_as_bytes!(PLIC);
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::Aml;
 
     fn check_checksum(madt: &MADT) {
         let mut bytes = Vec::new();
diff --git a/src/rhct.rs b/src/rhct.rs
index 7d4ac8a..507f575 100644
--- a/src/rhct.rs
+++ b/src/rhct.rs
@@ -335,7 +335,6 @@ impl Aml for MmuNode {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::Aml;
 
     #[test]
     fn test_rhct() {
diff --git a/src/rimt.rs b/src/rimt.rs
index 839df9a..7c816cc 100644
--- a/src/rimt.rs
+++ b/src/rimt.rs
@@ -492,6 +492,7 @@ impl Aml for Platform {
 
 #[cfg(test)]
 mod tests {
+    use alloc::vec;
     use super::*;
 
     fn rimt() -> RIMT {
diff --git a/src/spcr.rs b/src/spcr.rs
index db0d44a..0c421c8 100644
--- a/src/spcr.rs
+++ b/src/spcr.rs
@@ -167,6 +167,7 @@ impl SerialPortInfo {
 
 #[cfg(test)]
 mod tests {
+    use alloc::vec::Vec;
     use super::*;
 
     #[test]
diff --git a/src/tpm2.rs b/src/tpm2.rs
index c21de4e..d351daf 100644
--- a/src/tpm2.rs
+++ b/src/tpm2.rs
@@ -304,6 +304,7 @@ impl Aml for Tpm2 {
 
 #[cfg(test)]
 mod tests {
+    use alloc::vec::Vec;
     use super::*;
     use crate::gas;
 
diff --git a/src/xsdt.rs b/src/xsdt.rs
index 0eb5b59..0c551dd 100644
--- a/src/xsdt.rs
+++ b/src/xsdt.rs
@@ -72,6 +72,7 @@ impl Aml for XSDT {
 
 #[cfg(test)]
 mod tests {
+    use alloc::vec::Vec;
     use super::XSDT;
     use crate::Aml;