diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a4cf78b4ac0..6a2eaf72a50 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -36,6 +36,7 @@ jobs:
     timeout-minutes: 120
     env:
       CARGO_TARGET_DIR: ${{ github.workspace }}/target
+      RUST_BACKTRACE: full
       SPACETIMEDB_CPP_DIR: ${{ github.workspace }}/crates/bindings-cpp
     steps:
       - name: Find Git ref
@@ -182,6 +183,7 @@ jobs:
 
     env:
       CARGO_TARGET_DIR: ${{ github.workspace }}/target
+      RUST_BACKTRACE: full
     steps:
       - name: Find Git ref
         env:
@@ -272,6 +274,7 @@ jobs:
     timeout-minutes: 60
     env:
       CARGO_TARGET_DIR: ${{ github.workspace }}/target
+      RUST_BACKTRACE: full
     steps:
       - name: Find Git ref
         env:
@@ -327,6 +330,7 @@ jobs:
     runs-on: spacetimedb-new-runner-2
     env:
       CARGO_TARGET_DIR: ${{ github.workspace }}/target
+      RUST_BACKTRACE: full
     steps:
       - name: Checkout sources
         uses: actions/checkout@v3
@@ -366,6 +370,7 @@ jobs:
     runs-on: spacetimedb-new-runner-2
     env:
       CARGO_TARGET_DIR: ${{ github.workspace }}/target
+      RUST_BACKTRACE: full
     steps:
       - uses: actions/checkout@v3
 
@@ -390,6 +395,8 @@ jobs:
     name: Check that packages are publishable
     runs-on: spacetimedb-new-runner-2
     permissions: read-all
+    env:
+      RUST_BACKTRACE: full
     steps:
       - uses: actions/checkout@v3
       - uses: dsherret/rust-toolchain-file@v1
@@ -409,6 +416,8 @@ jobs:
           - { target: aarch64-apple-darwin, runner: macos-latest }
           - { target: x86_64-pc-windows-msvc, runner: windows-latest }
     runs-on: ${{ matrix.runner }}
+    env:
+      RUST_BACKTRACE: full
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -453,6 +462,8 @@ jobs:
       # Run as root because otherwise we get permission denied for various directories inside the container. I tried doing dances to allow it to run
       # without this (reassigning env vars and stuff), but was unable to get it to work and it felt like an uphill battle.
       options: --user 0:0
+    env:
+      RUST_BACKTRACE: full
     steps:
       # Uncomment this before merging so that it will run properly if run manually through the GH actions flow. It was playing weird with rolled back
       # commits though.
@@ -525,6 +536,8 @@ jobs:
   ci_command_docs:
     name: Check CI command docs
     runs-on: spacetimedb-new-runner-2
+    env:
+      RUST_BACKTRACE: full
     steps:
       - name: Find Git ref
         env:
@@ -557,6 +570,7 @@ jobs:
     runs-on: spacetimedb-new-runner-2
     env:
       CARGO_TARGET_DIR: ${{ github.workspace }}/target
+      RUST_BACKTRACE: full
     steps:
       - name: Find Git ref
         env:
@@ -627,6 +641,7 @@ jobs:
     timeout-minutes: 30
     env:
       CARGO_TARGET_DIR: ${{ github.workspace }}/target
+      RUST_BACKTRACE: full
     steps:
       - name: Checkout repository
         id: checkout-stdb
@@ -766,6 +781,7 @@ jobs:
     timeout-minutes: 30
     env:
       CARGO_TARGET_DIR: ${{ github.workspace }}/target
+      RUST_BACKTRACE: full
     steps:
       - name: Checkout repository
         id: checkout-stdb
@@ -883,6 +899,8 @@ jobs:
     runs-on: ubuntu-latest
     permissions:
       contents: read
+    env:
+      RUST_BACKTRACE: full
     steps:
       - name: Find Git ref
         env:
@@ -922,6 +940,7 @@ jobs:
       contents: read
     env:
       CARGO_TARGET_DIR: ${{ github.workspace }}/target
+      RUST_BACKTRACE: full
     steps:
       - name: Find Git ref
         env:
@@ -974,6 +993,8 @@ jobs:
   docs-build:
     name: Docs build
     runs-on: spacetimedb-new-runner-2
+    env:
+      RUST_BACKTRACE: full
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3
@@ -1011,6 +1032,8 @@ jobs:
   typescript-test:
     name: TypeScript - Tests
     runs-on: spacetimedb-new-runner-2
+    env:
+      RUST_BACKTRACE: full
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -1121,6 +1144,8 @@ jobs:
 
   version_upgrade_check:
     runs-on: spacetimedb-new-runner-2
+    env:
+      RUST_BACKTRACE: full
     steps:
       - name: Checkout
         uses: actions/checkout@v3
diff --git a/crates/smoketests/tests/smoketests/call.rs b/crates/smoketests/tests/smoketests/call.rs
index 9c033979bb7..d9a064ee402 100644
--- a/crates/smoketests/tests/smoketests/call.rs
+++ b/crates/smoketests/tests/smoketests/call.rs
@@ -41,8 +41,8 @@ Here are some existing procedures:
 - return_person"
     );
     assert!(
-        expected.contains(stderr.trim()),
-        "Expected stderr to be contained in expected message.\nExpected:\n{}\n\nActual stderr:\n{}",
+        stderr.trim().starts_with(&expected),
+        "Expected stderr to start with expected message.\nExpected:\n{}\n\nActual stderr:\n{}",
         expected,
         stderr.trim()
     );
@@ -63,8 +63,8 @@ Here are some existing procedures:
 - return_person"
     );
     assert!(
-        expected.contains(stderr.trim()),
-        "Expected stderr to be contained in expected message.\nExpected:\n{}\n\nActual stderr:\n{}",
+        stderr.trim().starts_with(&expected),
+        "Expected stderr to start with expected message.\nExpected:\n{}\n\nActual stderr:\n{}",
         expected,
         stderr.trim()
     );
@@ -81,8 +81,8 @@ Error: No such reducer OR procedure `say_hell` for database `{identity}` resolvi
 A reducer with a similar name exists: `say_hello`"
     );
     assert!(
-        expected.contains(stderr.trim()),
-        "Expected stderr to be contained in expected message.\nExpected:\n{}\n\nActual stderr:\n{}",
+        stderr.trim().starts_with(&expected),
+        "Expected stderr to start with expected message.\nExpected:\n{}\n\nActual stderr:\n{}",
         expected,
         stderr.trim()
     );
@@ -99,8 +99,8 @@ Error: No such reducer OR procedure `return_perso` for database `{identity}` res
 A procedure with a similar name exists: `return_person`"
     );
     assert!(
-        expected.contains(stderr.trim()),
-        "Expected stderr to be contained in expected message.\nExpected:\n{}\n\nActual stderr:\n{}",
+        stderr.trim().starts_with(&expected),
+        "Expected stderr to start with expected message.\nExpected:\n{}\n\nActual stderr:\n{}",
         expected,
         stderr.trim()
     );
@@ -126,8 +126,8 @@ The database has no reducers.
 The database has no procedures."
     );
     assert!(
-        expected.contains(stderr.trim()),
-        "Expected stderr to be contained in expected message.\nExpected:\n{}\n\nActual stderr:\n{}",
+        stderr.trim().starts_with(&expected),
+        "Expected stderr to start with expected message.\nExpected:\n{}\n\nActual stderr:\n{}",
         expected,
         stderr.trim()
     );
@@ -204,8 +204,8 @@ Here are some existing procedures:
 ... (1 procedure not shown)"
     );
     assert!(
-        expected.contains(stderr.trim()),
-        "Expected stderr to be contained in expected message.\nExpected:\n{}\n\nActual stderr:\n{}",
+        stderr.trim().starts_with(&expected),
+        "Expected stderr to start with expected message.\nExpected:\n{}\n\nActual stderr:\n{}",
         expected,
         stderr.trim()
     );