diff --git a/CHANGELOG.md b/CHANGELOG.md
index ca5f884..c18679b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,8 @@
 
 ## Unreleased
 
+* Add `before_all` commands to the Toolproof config
+
 ## v0.4.1 (October 2, 2024)
 
 * Improve resilience launching a Chrome instance
diff --git a/test_interactive.sh b/test_interactive.sh
new file mode 100755
index 0000000..44d3c00
--- /dev/null
+++ b/test_interactive.sh
@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+
+cargo build
+
+SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+cd $SCRIPT_DIR
+
+TOOLPROOF=$(realpath "$SCRIPT_DIR/target/debug/toolproof")
+
+cargo run --release -- --placeholders toolproof_path="$TOOLPROOF" -c 1 -i --all
diff --git a/toolproof/src/main.rs b/toolproof/src/main.rs
index 5be0d1e..660e526 100644
--- a/toolproof/src/main.rs
+++ b/toolproof/src/main.rs
@@ -1,6 +1,8 @@
 use std::collections::BTreeMap;
 use std::fmt::Display;
+use std::process::Stdio;
 use std::sync::Arc;
+use std::time::Duration;
 use std::{collections::HashMap, time::Instant};
 
 use console::{style, Term};
@@ -11,6 +13,7 @@ use schematic::color::owo::OwoColorize;
 use segments::ToolproofSegments;
 use similar_string::compare_similarity;
 use tokio::fs::read_to_string;
+use tokio::process::Command;
 use tokio::sync::OnceCell;
 use wax::Glob;
 
@@ -167,6 +170,42 @@ fn closest_strings<'o>(target: &String, options: &'o Vec<String>) -> Vec<(&'o St
 async fn main_inner() -> Result<(), ()> {
     let ctx = configure();
 
+    for before in &ctx.params.before_all {
+        let before_cmd = &before.command;
+        let mut command = Command::new("sh");
+        command
+            .arg("-c")
+            .current_dir(&ctx.working_directory)
+            .arg(before_cmd);
+
+        command.stdout(Stdio::piped());
+        command.stderr(Stdio::piped());
+
+        println!(
+            "{}{}",
+            "Running before_all command: ".blue().bold(),
+            before_cmd.cyan().bold(),
+        );
+
+        let running = command
+            .spawn()
+            .map_err(|_| eprintln!("Failed to run command: {before_cmd}"))?;
+
+        let Ok(_) =
+            (match tokio::time::timeout(Duration::from_secs(300), running.wait_with_output()).await
+            {
+                Ok(out) => out,
+                Err(_) => {
+                    eprintln!("Failed to run command due to timeout: {before_cmd}");
+                    return Err(());
+                }
+            })
+        else {
+            eprintln!("Failed to run command: {before_cmd}");
+            return Err(());
+        };
+    }
+
     let start = Instant::now();
 
     let glob = Glob::new("**/*.toolproof.yml").expect("Valid glob");
diff --git a/toolproof/src/options.rs b/toolproof/src/options.rs
index 90e8550..bfec3b7 100644
--- a/toolproof/src/options.rs
+++ b/toolproof/src/options.rs
@@ -130,6 +130,12 @@ pub enum ToolproofBrowserImpl {
     Pagebrowse,
 }
 
+#[derive(Config, Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
+#[config(rename_all = "snake_case")]
+pub struct ToolproofBeforeAll {
+    pub command: String,
+}
+
 #[derive(Config, Debug, Clone)]
 #[config(rename_all = "snake_case")]
 pub struct ToolproofParams {
@@ -171,6 +177,9 @@ pub struct ToolproofParams {
 
     /// Placeholder keys, and the values they should be replaced with
     pub placeholders: HashMap<String, String>,
+
+    /// Commands to run in the working directory before starting to run Toolproof tests
+    pub before_all: Vec<ToolproofBeforeAll>,
 }
 
 // The configuration object used internally
diff --git a/toolproof/test_suite/hooks/before_all.toolproof.yml b/toolproof/test_suite/hooks/before_all.toolproof.yml
new file mode 100644
index 0000000..23d0452
--- /dev/null
+++ b/toolproof/test_suite/hooks/before_all.toolproof.yml
@@ -0,0 +1,31 @@
+name: Toolproof runs before_all hooks
+
+steps:
+  - step: I have a "misc_file" file with the content "lorem ipsum"
+  - step: I have a "toolproof.yml" file with the content {yaml}
+    yaml: |-
+      before_all:
+        - command: 'echo " donor" >> misc_file'
+  - step: I have a "my_test.toolproof.yml" file with the content {yaml}
+    yaml: |-
+      name: Inner modified test
+
+      steps:
+        - step: I run "cat %toolproof_test_directory%/misc_file"
+        - stdout should contain "lorem ipsum donor"
+  - I run "%toolproof_path% --porcelain"
+  - snapshot: stdout
+    snapshot_content: |-
+      ╎Running before_all command: echo " donor" >> misc_file
+      ╎
+      ╎Running tests
+      ╎
+      ╎✓ Inner modified test
+      ╎
+      ╎Finished running tests
+      ╎
+      ╎Passing tests: 1
+      ╎Failing tests: 0
+      ╎Skipped tests: 0
+      ╎
+      ╎All tests passed