diff --git a/ci/aarch64-linux-debug.sh b/ci/aarch64-linux-debug.sh
index 5fc0a1b6a1a67a7acce2ff89b8c65e8fbac8fe10..27effea36a1294c2b4d4c33d8ea9bc41bdb0eee9 100644
--- a/ci/aarch64-linux-debug.sh
+++ b/ci/aarch64-linux-debug.sh
@@ -62,8 +62,7 @@ stage3-debug/bin/zig build test docs \
   -Dtarget=native-native-musl \
   --search-prefix "$PREFIX" \
   --zig-lib-dir "$PWD/../lib" \
-  -Denable-tidy \
-  -Dtest-slow-targets
+  -Denable-tidy
 
 # Ensure that updating the wasm binary from this commit will result in a viable build.
 stage3-debug/bin/zig build update-zig1
diff --git a/ci/aarch64-linux-release.sh b/ci/aarch64-linux-release.sh
index 3c307a11c783006e8c9d2d9f1eaf0db26cba50db..947694ce393d13dd452e4043c1e9fc90f1c0ab54 100644
--- a/ci/aarch64-linux-release.sh
+++ b/ci/aarch64-linux-release.sh
@@ -62,8 +62,7 @@ stage3-release/bin/zig build test docs \
   -Dtarget=native-native-musl \
   --search-prefix "$PREFIX" \
   --zig-lib-dir "$PWD/../lib" \
-  -Denable-tidy \
-  -Dtest-slow-targets
+  -Denable-tidy
 
 # 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 e233b00d6dba801f462cbae80974275b0dac1564..9283321c1f54483747f27221ae19ea5cee4d62af 100755
--- a/ci/aarch64-macos-debug.sh
+++ b/ci/aarch64-macos-debug.sh
@@ -55,5 +55,4 @@ stage3-debug/bin/zig build test docs \
   -Denable-macos-sdk \
   -Dstatic-llvm \
   -Dskip-non-native \
-  --search-prefix "$PREFIX" \
-  -Dtest-slow-targets
+  --search-prefix "$PREFIX"
diff --git a/ci/aarch64-macos-release.sh b/ci/aarch64-macos-release.sh
index ec3a23db18136e804e5a04b3a9c106a1ee8dcf87..396aa1d46469185e85b30d11d5728d77e363ceea 100755
--- a/ci/aarch64-macos-release.sh
+++ b/ci/aarch64-macos-release.sh
@@ -55,8 +55,7 @@ stage3-release/bin/zig build test docs \
   -Denable-macos-sdk \
   -Dstatic-llvm \
   -Dskip-non-native \
-  --search-prefix "$PREFIX" \
-  -Dtest-slow-targets
+  --search-prefix "$PREFIX"
 
 # 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 a761b336046a38554b54ad281d5dae0a968fa672..bf68a6443c015cb45514b446339fa822f4d49c00 100644
--- a/ci/aarch64-windows.ps1
+++ b/ci/aarch64-windows.ps1
@@ -67,8 +67,7 @@ Write-Output "Main test suite..."
   --search-prefix "$PREFIX_PATH" `
   -Dstatic-llvm `
   -Dskip-non-native `
-  -Denable-symlinks-windows `
-  -Dtest-slow-targets
+  -Denable-symlinks-windows
 CheckLastExitCode
 
 # Ensure that stage3 and stage4 are byte-for-byte identical.
diff --git a/ci/x86_64-linux-debug.sh b/ci/x86_64-linux-debug.sh
index f86e4053d3bc4aea56951047ef098653fb425070..75616627b3be6e460bab27516e42bb6445195bd2 100755
--- a/ci/x86_64-linux-debug.sh
+++ b/ci/x86_64-linux-debug.sh
@@ -71,8 +71,7 @@ stage3-debug/bin/zig build test docs \
   -Dtarget=native-native-musl \
   --search-prefix "$PREFIX" \
   --zig-lib-dir "$PWD/../lib" \
-  -Denable-tidy \
-  -Dtest-slow-targets
+  -Denable-tidy
 
 # Ensure that updating the wasm binary from this commit will result in a viable build.
 stage3-debug/bin/zig build update-zig1
diff --git a/ci/x86_64-linux-release.sh b/ci/x86_64-linux-release.sh
index dcf90facbb061d779881c7516b0ab647dcaee0ed..fd95d8eaf5736b00a18cdaac5b32a3dcf2e47b42 100755
--- a/ci/x86_64-linux-release.sh
+++ b/ci/x86_64-linux-release.sh
@@ -71,8 +71,7 @@ stage3-release/bin/zig build test docs \
   -Dtarget=native-native-musl \
   --search-prefix "$PREFIX" \
   --zig-lib-dir "$PWD/../lib" \
-  -Denable-tidy \
-  -Dtest-slow-targets
+  -Denable-tidy
 
 # Ensure that stage3 and stage4 are byte-for-byte identical.
 stage3-release/bin/zig build \
diff --git a/ci/x86_64-macos-release.sh b/ci/x86_64-macos-release.sh
index b6a0c00b2261b613b0150fab1fc762ac7a0a4f44..acf2b91d9a1ae0e42c16f4a5aad48385e60fff64 100755
--- a/ci/x86_64-macos-release.sh
+++ b/ci/x86_64-macos-release.sh
@@ -59,8 +59,7 @@ stage3/bin/zig build test docs \
   -Denable-macos-sdk \
   -Dstatic-llvm \
   -Dskip-non-native \
-  --search-prefix "$PREFIX" \
-  -Dtest-slow-targets
+  --search-prefix "$PREFIX"
 
 # Ensure that stage3 and stage4 are byte-for-byte identical.
 stage3/bin/zig build \
diff --git a/ci/x86_64-windows-debug.ps1 b/ci/x86_64-windows-debug.ps1
index 1d9c5b709bdc520cc1f8d21d02004f3e45fd96ff..db8be82d898507631e1a1f075cf51cbd294f339b 100644
--- a/ci/x86_64-windows-debug.ps1
+++ b/ci/x86_64-windows-debug.ps1
@@ -68,8 +68,7 @@ Write-Output "Main test suite..."
   -Dstatic-llvm `
   -Dskip-non-native `
   -Dskip-release `
-  -Denable-symlinks-windows `
-  -Dtest-slow-targets
+  -Denable-symlinks-windows
 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 a2dcd06d73fb43b78f58a01491081aa69ba9cd96..3d8938ce1982978c509892cc54fdfa91fea5f1a6 100644
--- a/ci/x86_64-windows-release.ps1
+++ b/ci/x86_64-windows-release.ps1
@@ -67,8 +67,7 @@ Write-Output "Main test suite..."
   --search-prefix "$PREFIX_PATH" `
   -Dstatic-llvm `
   -Dskip-non-native `
-  -Denable-symlinks-windows `
-  -Dtest-slow-targets
+  -Denable-symlinks-windows
 CheckLastExitCode
 
 # Ensure that stage3 and stage4 are byte-for-byte identical.