diff --git a/parser/build.rs b/parser/build.rs
index 19f1027217..0bfc792768 100644
--- a/parser/build.rs
+++ b/parser/build.rs
@@ -1,5 +1,3 @@
-use lalrpop;
-
 fn main() {
     lalrpop::process_root().unwrap()
 }
diff --git a/vm/src/obj/objfloat.rs b/vm/src/obj/objfloat.rs
index b29e2cbc21..d8e6f25d99 100644
--- a/vm/src/obj/objfloat.rs
+++ b/vm/src/obj/objfloat.rs
@@ -1,4 +1,3 @@
-use hexf_parse;
 use num_bigint::{BigInt, ToBigInt};
 use num_rational::Ratio;
 use num_traits::{float::Float, pow, sign::Signed, ToPrimitive, Zero};
diff --git a/vm/src/py_serde.rs b/vm/src/py_serde.rs
index 47520bb130..38e0bc9334 100644
--- a/vm/src/py_serde.rs
+++ b/vm/src/py_serde.rs
@@ -1,6 +1,5 @@
-use std::fmt;
-
-use serde;
+use num_traits::cast::ToPrimitive;
+use num_traits::sign::Signed;
 use serde::de::{DeserializeSeed, Visitor};
 use serde::ser::{Serialize, SerializeMap, SerializeSeq};
 
@@ -10,8 +9,6 @@ use crate::obj::{
 };
 use crate::pyobject::{IdProtocol, ItemProtocol, PyObjectRef, TypeProtocol};
 use crate::VirtualMachine;
-use num_traits::cast::ToPrimitive;
-use num_traits::sign::Signed;
 
 #[inline]
 pub fn serialize<S>(
@@ -137,7 +134,7 @@ impl<'de> DeserializeSeed<'de> for PyObjectDeserializer<'de> {
 impl<'de> Visitor<'de> for PyObjectDeserializer<'de> {
     type Value = PyObjectRef;
 
-    fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+    fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
         formatter.write_str("a type that can deserialise in Python")
     }
 
diff --git a/vm/src/stdlib/os.rs b/vm/src/stdlib/os.rs
index 0de7176898..3c6f97cd94 100644
--- a/vm/src/stdlib/os.rs
+++ b/vm/src/stdlib/os.rs
@@ -1,4 +1,3 @@
-use num_cpus;
 use std::cell::{Cell, RefCell};
 use std::ffi;
 use std::fs::File;
@@ -13,8 +12,6 @@ use std::{env, fs};
 
 use bitflags::bitflags;
 #[cfg(unix)]
-use exitcode;
-#[cfg(unix)]
 use nix::errno::Errno;
 #[cfg(all(unix, not(target_os = "redox")))]
 use nix::pty::openpty;
@@ -24,8 +21,6 @@ use nix::unistd::{self, Gid, Pid, Uid};
 use std::os::unix::io::RawFd;
 #[cfg(windows)]
 use std::os::windows::io::RawHandle;
-#[cfg(unix)]
-use uname;
 
 use super::errno::errors;
 use crate::exceptions::PyBaseExceptionRef;
diff --git a/vm/src/stdlib/signal.rs b/vm/src/stdlib/signal.rs
index e8ae729913..b5c9baabfe 100644
--- a/vm/src/stdlib/signal.rs
+++ b/vm/src/stdlib/signal.rs
@@ -8,7 +8,6 @@ use arr_macro::arr;
 #[cfg(unix)]
 use nix::unistd::alarm as sig_alarm;
 
-use libc;
 #[cfg(not(windows))]
 use libc::{SIG_DFL, SIG_ERR, SIG_IGN};
 
diff --git a/vm/src/stdlib/subprocess.rs b/vm/src/stdlib/subprocess.rs
index 67cffccb38..400c30838e 100644
--- a/vm/src/stdlib/subprocess.rs
+++ b/vm/src/stdlib/subprocess.rs
@@ -4,8 +4,6 @@ use std::fs::File;
 use std::io::ErrorKind;
 use std::time::Duration;
 
-use subprocess;
-
 use crate::function::OptionalArg;
 use crate::obj::objbytes::PyBytesRef;
 use crate::obj::objlist::PyListRef;
diff --git a/wasm/lib/src/convert.rs b/wasm/lib/src/convert.rs
index 916d36fb98..cb0f6c707e 100644
--- a/wasm/lib/src/convert.rs
+++ b/wasm/lib/src/convert.rs
@@ -1,5 +1,4 @@
 use js_sys::{Array, ArrayBuffer, Object, Promise, Reflect, SyntaxError, Uint8Array};
-use serde_wasm_bindgen;
 use wasm_bindgen::{closure::Closure, prelude::*, JsCast};
 
 use rustpython_compiler::error::{CompileError, CompileErrorType};