diff --git a/fuzz/fuzz_targets/domtree.rs b/fuzz/fuzz_targets/domtree.rs
index 0688578..4cd8d79 100644
--- a/fuzz/fuzz_targets/domtree.rs
+++ b/fuzz/fuzz_targets/domtree.rs
@@ -8,7 +8,10 @@ use libfuzzer_sys::arbitrary::{Arbitrary, Result, Unstructured};
 use libfuzzer_sys::fuzz_target;
 use std::collections::HashSet;
 
-use regalloc2::{domtree, postorder, Block};
+use regalloc2::{
+    fuzzing::{domtree, postorder},
+    Block,
+};
 
 #[derive(Clone, Debug)]
 struct CFG {
@@ -96,7 +99,10 @@ fn check_idom_violations(idom: &[Block], path: &Path) {
         // and false for every other block.
         for domblock in 0..idom.len() {
             let domblock = Block::new(domblock);
-            assert_eq!(domset.contains(&domblock), domtree::dominates(idom, domblock, *block));
+            assert_eq!(
+                domset.contains(&domblock),
+                domtree::dominates(idom, domblock, *block)
+            );
         }
         visited.insert(*block);
     }
@@ -112,10 +118,7 @@ impl Arbitrary for TestCase {
     fn arbitrary(u: &mut Unstructured) -> Result<TestCase> {
         let cfg = CFG::arbitrary(u)?;
         let path = Path::choose_from_cfg(&cfg, u)?;
-        Ok(TestCase {
-            cfg,
-            path,
-        })
+        Ok(TestCase { cfg, path })
     }
 }
 
diff --git a/fuzz/fuzz_targets/ion.rs b/fuzz/fuzz_targets/ion.rs
index 288b8fb..82aee65 100644
--- a/fuzz/fuzz_targets/ion.rs
+++ b/fuzz/fuzz_targets/ion.rs
@@ -12,5 +12,5 @@ fuzz_target!(|func: Func| {
     let _ = env_logger::try_init();
     log::debug!("func:\n{:?}", func);
     let env = regalloc2::fuzzing::func::machine_env();
-    let _out = regalloc2::ion::run(&func, &env, false).expect("regalloc did not succeed");
+    let _out = regalloc2::fuzzing::ion::run(&func, &env, false).expect("regalloc did not succeed");
 });
diff --git a/fuzz/fuzz_targets/ion_checker.rs b/fuzz/fuzz_targets/ion_checker.rs
index f6e8cd5..950d4d7 100644
--- a/fuzz/fuzz_targets/ion_checker.rs
+++ b/fuzz/fuzz_targets/ion_checker.rs
@@ -7,7 +7,7 @@
 use libfuzzer_sys::arbitrary::{Arbitrary, Result, Unstructured};
 use libfuzzer_sys::fuzz_target;
 
-use regalloc2::checker::Checker;
+use regalloc2::fuzzing::checker::Checker;
 use regalloc2::fuzzing::func::{Func, Options};
 
 #[derive(Clone, Debug)]
@@ -40,7 +40,7 @@ fuzz_target!(|testcase: TestCase| {
     let _ = env_logger::try_init();
     log::debug!("func:\n{:?}", func);
     let env = regalloc2::fuzzing::func::machine_env();
-    let out = regalloc2::ion::run(&func, &env, true).expect("regalloc did not succeed");
+    let out = regalloc2::fuzzing::ion::run(&func, &env, true).expect("regalloc did not succeed");
 
     let mut checker = Checker::new(&func);
     checker.prepare(&out);
diff --git a/fuzz/fuzz_targets/moves.rs b/fuzz/fuzz_targets/moves.rs
index 040c3e1..e62342f 100644
--- a/fuzz/fuzz_targets/moves.rs
+++ b/fuzz/fuzz_targets/moves.rs
@@ -7,7 +7,7 @@
 use libfuzzer_sys::arbitrary::{Arbitrary, Result, Unstructured};
 use libfuzzer_sys::fuzz_target;
 
-use regalloc2::moves::ParallelMoves;
+use regalloc2::fuzzing::moves::ParallelMoves;
 use regalloc2::{Allocation, PReg, RegClass};
 use std::collections::HashSet;
 
diff --git a/fuzz/fuzz_targets/ssagen.rs b/fuzz/fuzz_targets/ssagen.rs
index d68d672..bed2253 100644
--- a/fuzz/fuzz_targets/ssagen.rs
+++ b/fuzz/fuzz_targets/ssagen.rs
@@ -7,9 +7,9 @@
 use libfuzzer_sys::arbitrary::{Arbitrary, Result, Unstructured};
 use libfuzzer_sys::fuzz_target;
 
-use regalloc2::cfg::CFGInfo;
+use regalloc2::fuzzing::cfg::CFGInfo;
 use regalloc2::fuzzing::func::{Func, Options};
-use regalloc2::ssa::validate_ssa;
+use regalloc2::fuzzing::ssa::validate_ssa;
 
 #[derive(Debug)]
 struct TestCase {
diff --git a/src/fuzzing/mod.rs b/src/fuzzing/mod.rs
index ae548d9..e6a225e 100644
--- a/src/fuzzing/mod.rs
+++ b/src/fuzzing/mod.rs
@@ -6,3 +6,27 @@
 //! Utilities for fuzzing.
 
 pub mod func;
+
+// Re-exports for fuzz targets.
+
+pub mod domtree {
+    pub use crate::domtree::*;
+}
+pub mod postorder {
+    pub use crate::postorder::*;
+}
+pub mod moves {
+    pub use crate::moves::*;
+}
+pub mod cfg {
+    pub use crate::cfg::*;
+}
+pub mod ssa {
+    pub use crate::ssa::*;
+}
+pub mod ion {
+    pub use crate::ion::*;
+}
+pub mod checker {
+    pub use crate::checker::*;
+}
diff --git a/src/lib.rs b/src/lib.rs
index 92dd1f5..ee5afb2 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -12,16 +12,16 @@
 
 #![allow(dead_code)]
 
-pub mod bitvec;
-pub mod cfg;
-pub mod domtree;
-pub mod ion;
-pub mod moves;
-pub mod postorder;
-pub mod ssa;
+pub(crate) mod bitvec;
+pub(crate) mod cfg;
+pub(crate) mod domtree;
+pub(crate) mod ion;
+pub(crate) mod moves;
+pub(crate) mod postorder;
+pub(crate) mod ssa;
 
 #[macro_use]
-pub mod index;
+mod index;
 pub use index::{Block, Inst, InstRange, InstRangeIter};
 
 pub mod checker;