diff --git a/compiler/rustc_driver_impl/src/lib.rs b/compiler/rustc_driver_impl/src/lib.rs
index b13cc4d0b066d..90f382e72268b 100644
--- a/compiler/rustc_driver_impl/src/lib.rs
+++ b/compiler/rustc_driver_impl/src/lib.rs
@@ -1388,7 +1388,9 @@ pub fn install_ice_hook(
     // opt in to less-verbose backtraces by manually setting "RUST_BACKTRACE"
     // (e.g. `RUST_BACKTRACE=1`)
     if env::var_os("RUST_BACKTRACE").is_none() {
-        if env!("CFG_RELEASE_CHANNEL") == "dev" {
+        // HACK: this check is extremely dumb, but we don't really need it to be smarter since this should only happen in the test suite anyway.
+        let ui_testing = std::env::args().any(|arg| arg == "-Zui-testing");
+        if env!("CFG_RELEASE_CHANNEL") == "dev" && !ui_testing {
             panic::set_backtrace_style(panic::BacktraceStyle::Short);
         } else {
             panic::set_backtrace_style(panic::BacktraceStyle::Full);
diff --git a/tests/ui/panics/default-backtrace-ice.rs b/tests/ui/panics/default-backtrace-ice.rs
index 718d1da5bb759..7953283f02813 100644
--- a/tests/ui/panics/default-backtrace-ice.rs
+++ b/tests/ui/panics/default-backtrace-ice.rs
@@ -1,6 +1,8 @@
 //@ unset-rustc-env:RUST_BACKTRACE
 //@ compile-flags:-Z treat-err-as-bug=1
 //@ error-pattern:stack backtrace:
+// Verify this is a full backtrace, not a short backtrace.
+//@ error-pattern:__rust_begin_short_backtrace
 //@ failure-status:101
 //@ ignore-msvc
 //@ normalize-stderr-test: "note: .*" -> ""
diff --git a/tests/ui/panics/default-backtrace-ice.stderr b/tests/ui/panics/default-backtrace-ice.stderr
index 23b863568bc74..046b2cca7f9be 100644
--- a/tests/ui/panics/default-backtrace-ice.stderr
+++ b/tests/ui/panics/default-backtrace-ice.stderr
@@ -1,5 +1,5 @@
 error: internal compiler error[E0425]: cannot find value `missing_ident` in this scope
-  --> $DIR/default-backtrace-ice.rs:21:13
+  --> $DIR/default-backtrace-ice.rs:23:13
    |
 LL | fn main() { missing_ident; }
    |             ^^^^^^^^^^^^^ not found in this scope