diff --git a/scripts/test_all_fuzzers.sh b/scripts/test_all_fuzzers.sh
index 3a2005ba07..83b786ce87 100755
--- a/scripts/test_all_fuzzers.sh
+++ b/scripts/test_all_fuzzers.sh
@@ -10,7 +10,7 @@ if [[ -z "${RUN_ON_CI}" ]]; then
   backtrace_fuzzers=$(find ./fuzzers/backtrace_baby_fuzzers -mindepth 1 -maxdepth 1 -type d)
 else
   cargo build -p build_and_test_fuzzers
-  fuzzers=$(cargo run -p build_and_test_fuzzers -- remotes/origin/main)
+  fuzzers=$(cargo run -p build_and_test_fuzzers -- "remotes/origin/main" "HEAD^")
   backtrace_fuzzers=""
 fi
 
diff --git a/utils/build_and_test_fuzzers/src/diffing.rs b/utils/build_and_test_fuzzers/src/diffing.rs
index 21c52c4728..8b770e38cb 100644
--- a/utils/build_and_test_fuzzers/src/diffing.rs
+++ b/utils/build_and_test_fuzzers/src/diffing.rs
@@ -20,17 +20,24 @@ pub fn run_git_diff(args: &[&str]) -> String {
 }
 
 #[must_use]
-pub fn get_diffing_files(commit_name: &str) -> Vec<PathBuf> {
-    let args = vec!["--name-only", commit_name];
-    let diff = run_git_diff(&args);
-    diff.lines()
-        .map(PathBuf::from)
-        .filter(|x| x.is_file())
-        .collect()
+pub fn get_diffing_files(commits: &[String]) -> HashSet<PathBuf> {
+    let mut files = HashSet::<PathBuf>::default();
+    for commit_name in commits {
+        let args = vec!["--name-only", commit_name];
+        for file in run_git_diff(&args)
+            .lines()
+            .map(PathBuf::from)
+            .filter(|x| x.is_file())
+        {
+            files.insert(file);
+        }
+    }
+    files
 }
 
+#[allow(clippy::implicit_hasher)]
 #[must_use]
-pub fn get_diffing_crates(diffing_files: &[PathBuf]) -> HashSet<PathBuf> {
+pub fn get_diffing_crates(diffing_files: &HashSet<PathBuf>) -> HashSet<PathBuf> {
     // TODO maybe consider using a combination of this and https://docs.rs/cargo/0.28.0/cargo/sources/path/struct.PathSource.html
     let mut crates = HashSet::default();
     for file in diffing_files {
diff --git a/utils/build_and_test_fuzzers/src/main.rs b/utils/build_and_test_fuzzers/src/main.rs
index a9ece18e1b..61e5d6f5a2 100644
--- a/utils/build_and_test_fuzzers/src/main.rs
+++ b/utils/build_and_test_fuzzers/src/main.rs
@@ -5,13 +5,13 @@ pub use diffing::*;
 
 fn main() {
     let args: Vec<String> = env::args().collect();
-    let commit = if args.len() > 1 {
-        &args[1]
+    let commits = if args.len() > 1 {
+        args[1..].to_vec()
     } else {
-        "origin/main"
+        vec!["origin/main".into()]
     };
 
-    let files = get_diffing_files(commit);
+    let files = get_diffing_files(&commits);
     let mut diff_crates = get_diffing_crates(&files);
     let all_crates = find_all_crates();
     extend_diffing_crates_with_deps(&mut diff_crates, &all_crates);