diff --git a/src/database/connection.rs b/src/database/connection.rs
index ee7da02..98c8635 100644
--- a/src/database/connection.rs
+++ b/src/database/connection.rs
@@ -7854,6 +7854,9 @@ mod tests {
         let status = std::process::Command::new("git")
             .args(args)
             .current_dir(repo)
+            // Do not inherit developer's git configuration.
+            .env("GIT_CONFIG_GLOBAL", "/dev/null")
+            .env("GIT_CONFIG_SYSTEM", "/dev/null")
             .env("GIT_AUTHOR_NAME", "Semcode Test")
             .env("GIT_AUTHOR_EMAIL", "semcode@example.com")
             .env("GIT_COMMITTER_NAME", "Semcode Test")
diff --git a/src/git.rs b/src/git.rs
index 0704d0c..97e69db 100644
--- a/src/git.rs
+++ b/src/git.rs
@@ -235,6 +235,9 @@ mod tests {
             let status = std::process::Command::new("git")
                 .args(args)
                 .current_dir(dir.path())
+                // Do not inherit developer's git configuration.
+                .env("GIT_CONFIG_GLOBAL", "/dev/null")
+                .env("GIT_CONFIG_SYSTEM", "/dev/null")
                 .env("GIT_AUTHOR_NAME", "Semcode Test")
                 .env("GIT_AUTHOR_EMAIL", "semcode@example.com")
                 .env("GIT_COMMITTER_NAME", "Semcode Test")
diff --git a/src/indexer.rs b/src/indexer.rs
index a7a9f48..2752ea1 100644
--- a/src/indexer.rs
+++ b/src/indexer.rs
@@ -1146,6 +1146,9 @@ mod tests {
         let out = std::process::Command::new("git")
             .args(args)
             .current_dir(repo)
+            // Do not inherit developer's git configuration.
+            .env("GIT_CONFIG_GLOBAL", "/dev/null")
+            .env("GIT_CONFIG_SYSTEM", "/dev/null")
             .env("GIT_AUTHOR_NAME", "test")
             .env("GIT_AUTHOR_EMAIL", "test@test.com")
             .env("GIT_COMMITTER_NAME", "test")
diff --git a/src/workdir.rs b/src/workdir.rs
index d2128eb..733e1c8 100644
--- a/src/workdir.rs
+++ b/src/workdir.rs
@@ -713,11 +713,17 @@ void hello(void);
         std::process::Command::new("git")
             .args(["add", "."])
             .current_dir(&repo_path)
+            // Do not inherit developer's git configuration.
+            .env("GIT_CONFIG_GLOBAL", "/dev/null")
+            .env("GIT_CONFIG_SYSTEM", "/dev/null")
             .output()
             .unwrap();
         std::process::Command::new("git")
             .args(["commit", "-m", "initial"])
             .current_dir(&repo_path)
+            // Do not inherit developer's git configuration.
+            .env("GIT_CONFIG_GLOBAL", "/dev/null")
+            .env("GIT_CONFIG_SYSTEM", "/dev/null")
             .env("GIT_AUTHOR_NAME", "test")
             .env("GIT_AUTHOR_EMAIL", "test@test.com")
             .env("GIT_COMMITTER_NAME", "test")
@@ -791,6 +797,9 @@ int multiply(int a, int b) {
         std::process::Command::new("git")
             .args(["add", "new.c"])
             .current_dir(&repo_path)
+            // Do not inherit developer's git configuration.
+            .env("GIT_CONFIG_GLOBAL", "/dev/null")
+            .env("GIT_CONFIG_SYSTEM", "/dev/null")
             .output()
             .unwrap();
 
@@ -831,6 +840,9 @@ int multiply(int a, int b) {
         std::process::Command::new("git")
             .args(["add", "new.c"])
             .current_dir(&repo_path)
+            // Do not inherit developer's git configuration.
+            .env("GIT_CONFIG_GLOBAL", "/dev/null")
+            .env("GIT_CONFIG_SYSTEM", "/dev/null")
             .output()
             .unwrap();
 
diff --git a/tests/ambiguous_callees.rs b/tests/ambiguous_callees.rs
index 025b1a4..55e6cfd 100644
--- a/tests/ambiguous_callees.rs
+++ b/tests/ambiguous_callees.rs
@@ -10,6 +10,9 @@ fn git_run(repo: &Path, args: &[&str]) {
     let status = Command::new("git")
         .args(args)
         .current_dir(repo)
+        // Do not inherit developer's git configuration.
+        .env("GIT_CONFIG_GLOBAL", "/dev/null")
+        .env("GIT_CONFIG_SYSTEM", "/dev/null")
         .env("GIT_AUTHOR_NAME", "Semcode Test")
         .env("GIT_AUTHOR_EMAIL", "semcode@example.com")
         .env("GIT_COMMITTER_NAME", "Semcode Test")
diff --git a/tests/indirect_calls.rs b/tests/indirect_calls.rs
index 17ea0b9..8c57612 100644
--- a/tests/indirect_calls.rs
+++ b/tests/indirect_calls.rs
@@ -34,6 +34,9 @@ fn git_run(repo: &Path, args: &[&str]) {
     let status = Command::new("git")
         .args(args)
         .current_dir(repo)
+        // Do not inherit developer's git configuration.
+        .env("GIT_CONFIG_GLOBAL", "/dev/null")
+        .env("GIT_CONFIG_SYSTEM", "/dev/null")
         .env("GIT_AUTHOR_NAME", "Semcode Test")
         .env("GIT_AUTHOR_EMAIL", "semcode@example.com")
         .env("GIT_COMMITTER_NAME", "Semcode Test")
diff --git a/tests/revision_scoping.rs b/tests/revision_scoping.rs
index af4678b..c676004 100644
--- a/tests/revision_scoping.rs
+++ b/tests/revision_scoping.rs
@@ -11,6 +11,9 @@ fn git_run(repo: &Path, args: &[&str]) {
     let status = Command::new("git")
         .args(args)
         .current_dir(repo)
+        // Do not inherit developer's git configuration.
+        .env("GIT_CONFIG_GLOBAL", "/dev/null")
+        .env("GIT_CONFIG_SYSTEM", "/dev/null")
         .env("GIT_AUTHOR_NAME", "Semcode Test")
         .env("GIT_AUTHOR_EMAIL", "semcode@example.com")
         .env("GIT_COMMITTER_NAME", "Semcode Test")