diff --git a/ci/aarch64-linux-debug.sh b/ci/aarch64-linux-debug.sh
index 67514c87d88b72b691ad56cbdc35a99cd8e6da38..00cf48f5130f8509e7d33569f78d301f85fc376f 100755
--- a/ci/aarch64-linux-debug.sh
+++ b/ci/aarch64-linux-debug.sh
@@ -50,7 +50,8 @@ stage3-debug/bin/zig build test docs \
   -Dtarget=native-native-musl \
   --search-prefix "$PREFIX" \
   --zig-lib-dir "$PWD/../lib" \
-  -Denable-superhtml
+  -Denable-superhtml \
+  --test-timeout-ms 60_000
 
 stage3-debug/bin/zig build \
   --prefix stage4-debug \
diff --git a/ci/aarch64-linux-release.sh b/ci/aarch64-linux-release.sh
index 11fb70aa64737bf8ec47c90d727c4e230f7fbba2..f0a341d9623dc22d6a25f9200ee5e66c1d5506cb 100755
--- a/ci/aarch64-linux-release.sh
+++ b/ci/aarch64-linux-release.sh
@@ -50,7 +50,8 @@ stage3-release/bin/zig build test docs \
   -Dtarget=native-native-musl \
   --search-prefix "$PREFIX" \
   --zig-lib-dir "$PWD/../lib" \
-  -Denable-superhtml
+  -Denable-superhtml \
+  --test-timeout-ms 60_000
 
 # Ensure that stage3 and stage4 are byte-for-byte identical.
 stage3-release/bin/zig build \
diff --git a/ci/aarch64-macos-debug.sh b/ci/aarch64-macos-debug.sh
index b4e52f7b04c0e6453574798d7f5ac3993601aa00..787df10de4151fcdc375879826035d0925e03c71 100755
--- a/ci/aarch64-macos-debug.sh
+++ b/ci/aarch64-macos-debug.sh
@@ -46,4 +46,5 @@ stage3-debug/bin/zig build test docs \
   -Denable-macos-sdk \
   -Dstatic-llvm \
   -Dskip-non-native \
-  --search-prefix "$PREFIX"
+  --search-prefix "$PREFIX" \
+  --test-timeout-ms 60_000
diff --git a/ci/aarch64-macos-release.sh b/ci/aarch64-macos-release.sh
index 1de4d78e01f7ced832d3eb60adfadfb64b0efe77..872a2f4ee73b897f5eb0bf0a4948088793ffdf40 100755
--- a/ci/aarch64-macos-release.sh
+++ b/ci/aarch64-macos-release.sh
@@ -46,7 +46,8 @@ stage3-release/bin/zig build test docs \
   -Denable-macos-sdk \
   -Dstatic-llvm \
   -Dskip-non-native \
-  --search-prefix "$PREFIX"
+  --search-prefix "$PREFIX" \
+  --test-timeout-ms 60_000
 
 # Ensure that stage3 and stage4 are byte-for-byte identical.
 stage3-release/bin/zig build \
diff --git a/ci/aarch64-windows.ps1 b/ci/aarch64-windows.ps1
index 0bebaefb681ad9ff892b24d3f4acbefb3812cbe6..4f52bd3f81ae5fd13890a641305f4af95c348aa1 100644
--- a/ci/aarch64-windows.ps1
+++ b/ci/aarch64-windows.ps1
@@ -58,7 +58,8 @@ Write-Output "Main test suite..."
   --search-prefix "$PREFIX_PATH" `
   -Dstatic-llvm `
   -Dskip-non-native `
-  -Denable-symlinks-windows
+  -Denable-symlinks-windows `
+  --test-timeout-ms 60_000
 CheckLastExitCode
 
 # Ensure that stage3 and stage4 are byte-for-byte identical.
diff --git a/ci/riscv64-linux-debug.sh b/ci/riscv64-linux-debug.sh
index c7660962e340d9d6a31ed01538a1069302e13b38..f8bc19dd9a640e191ff1cd43d68dc7bc77531e1a 100755
--- a/ci/riscv64-linux-debug.sh
+++ b/ci/riscv64-linux-debug.sh
@@ -51,4 +51,5 @@ stage3-debug/bin/zig build test-cases test-modules test-unit test-c-abi test-sta
   -Dskip-compile-errors \
   -Dtarget=native-native-musl \
   --search-prefix "$PREFIX" \
-  --zig-lib-dir "$PWD/../lib"
+  --zig-lib-dir "$PWD/../lib" \
+  --test-timeout-ms 60_000
diff --git a/ci/riscv64-linux-release.sh b/ci/riscv64-linux-release.sh
index 65f46cbbd92102bc0e5067314818aac757a0ac6f..03e4d08fc99cc4993dd14e0b8e8b3d64499a3d4c 100755
--- a/ci/riscv64-linux-release.sh
+++ b/ci/riscv64-linux-release.sh
@@ -51,4 +51,5 @@ stage3-release/bin/zig build test-cases test-modules test-unit test-c-abi test-s
   -Dskip-compile-errors \
   -Dtarget=native-native-musl \
   --search-prefix "$PREFIX" \
-  --zig-lib-dir "$PWD/../lib"
+  --zig-lib-dir "$PWD/../lib" \
+  --test-timeout-ms 60_000
diff --git a/ci/x86_64-linux-debug-llvm.sh b/ci/x86_64-linux-debug-llvm.sh
index e21700a3084fb13a621db836e41fb5bcfc0e8d85..ce83ce3ed3266ad9398505410d1202d7a9664d8f 100755
--- a/ci/x86_64-linux-debug-llvm.sh
+++ b/ci/x86_64-linux-debug-llvm.sh
@@ -61,4 +61,5 @@ stage3-debug/bin/zig build test docs \
   -Dtarget=native-native-musl \
   --search-prefix "$PREFIX" \
   --zig-lib-dir "$PWD/../lib" \
-  -Denable-superhtml
+  -Denable-superhtml \
+  --test-timeout-ms 60_000
diff --git a/ci/x86_64-linux-debug.sh b/ci/x86_64-linux-debug.sh
index 5f038c2839418cfd4d011d4de5295dceaeca2916..b402396a1d28995c070d87b527fdf5792b87ca35 100755
--- a/ci/x86_64-linux-debug.sh
+++ b/ci/x86_64-linux-debug.sh
@@ -61,4 +61,5 @@ stage3-debug/bin/zig build test docs \
   -Dtarget=native-native-musl \
   --search-prefix "$PREFIX" \
   --zig-lib-dir "$PWD/../lib" \
-  -Denable-superhtml
+  -Denable-superhtml \
+  --test-timeout-ms 60_000
diff --git a/ci/x86_64-linux-release.sh b/ci/x86_64-linux-release.sh
index 53b93c75bb15225c39636e79c852c3a4a20bf27a..b7b593a0c862765ff91eadddf422171b7c75ddad 100755
--- a/ci/x86_64-linux-release.sh
+++ b/ci/x86_64-linux-release.sh
@@ -63,7 +63,8 @@ stage3-release/bin/zig build test docs \
   -Dtarget=native-native-musl \
   --search-prefix "$PREFIX" \
   --zig-lib-dir "$PWD/../lib" \
-  -Denable-superhtml
+  -Denable-superhtml \
+  --test-timeout-ms 60_000
 
 # Ensure that stage3 and stage4 are byte-for-byte identical.
 stage3-release/bin/zig build \
diff --git a/ci/x86_64-windows-debug.ps1 b/ci/x86_64-windows-debug.ps1
index f44c5a04f7c9598d0ffd092f7d558e1a514b9361..445a55f35e2a23af61c00c9f1767c68e2cf9a1e6 100644
--- a/ci/x86_64-windows-debug.ps1
+++ b/ci/x86_64-windows-debug.ps1
@@ -59,7 +59,8 @@ Write-Output "Main test suite..."
   -Dstatic-llvm `
   -Dskip-non-native `
   -Dskip-release `
-  -Denable-symlinks-windows
+  -Denable-symlinks-windows `
+  --test-timeout-ms 60_000
 CheckLastExitCode
 
 Write-Output "Build x86_64-windows-msvc behavior tests using the C backend..."
diff --git a/ci/x86_64-windows-release.ps1 b/ci/x86_64-windows-release.ps1
index c419cd309d3ccbb2f04cfcc9a92e1eee26dcb29d..226e2d8ea1ecd52eee75051d609c5e4c90620931 100644
--- a/ci/x86_64-windows-release.ps1
+++ b/ci/x86_64-windows-release.ps1
@@ -58,7 +58,8 @@ Write-Output "Main test suite..."
   --search-prefix "$PREFIX_PATH" `
   -Dstatic-llvm `
   -Dskip-non-native `
-  -Denable-symlinks-windows
+  -Denable-symlinks-windows `
+  --test-timeout-ms 60_000
 CheckLastExitCode
 
 # Ensure that stage3 and stage4 are byte-for-byte identical.