diff --git a/validator_manager/src/validators/create_validators.rs b/validator_manager/src/validators/create_validators.rs
index 8c5d43d57a..6d8d1b5a42 100644
--- a/validator_manager/src/validators/create_validators.rs
+++ b/validator_manager/src/validators/create_validators.rs
@@ -505,6 +505,8 @@ async fn run<'a, T: EthSpec>(config: CreateConfig, spec: &ChainSpec) -> Result<(
     Ok(())
 }
 
+// The tests use crypto and are too slow in debug.
+#[cfg(not(debug_assertions))]
 #[cfg(test)]
 pub mod tests {
     use super::*;
diff --git a/validator_manager/src/validators/import_validators.rs b/validator_manager/src/validators/import_validators.rs
index c551e552a5..f1ad622502 100644
--- a/validator_manager/src/validators/import_validators.rs
+++ b/validator_manager/src/validators/import_validators.rs
@@ -189,6 +189,8 @@ async fn run<'a>(config: ImportConfig) -> Result<(), String> {
     Ok(())
 }
 
+// The tests use crypto and are too slow in debug.
+#[cfg(not(debug_assertions))]
 #[cfg(test)]
 pub mod tests {
     use super::*;
diff --git a/validator_manager/src/validators/move_validators.rs b/validator_manager/src/validators/move_validators.rs
index 8be2efb845..02223df587 100644
--- a/validator_manager/src/validators/move_validators.rs
+++ b/validator_manager/src/validators/move_validators.rs
@@ -529,6 +529,8 @@ pub fn backup_validator<P: AsRef<Path>>(
     )
 }
 
+// The tests use crypto and are too slow in debug.
+#[cfg(not(debug_assertions))]
 #[cfg(test)]
 mod test {
     use super::*;