diff --git a/ci/aarch64-linux-debug.sh b/ci/aarch64-linux-debug.sh
index 90ed8bbc35..94f40c557b 100644
--- a/ci/aarch64-linux-debug.sh
+++ b/ci/aarch64-linux-debug.sh
@@ -60,7 +60,6 @@ stage3-debug/bin/zig build -Dtarget=arm-linux-musleabihf
 # TODO: add -fqemu back to this line
 
 stage3-debug/bin/zig build test docs \
-  -j1 \
   -fwasmtime \
   -Dstatic-llvm \
   -Dtarget=native-native-musl \
diff --git a/ci/aarch64-linux-release.sh b/ci/aarch64-linux-release.sh
index e99e3e1c08..65d6063f25 100644
--- a/ci/aarch64-linux-release.sh
+++ b/ci/aarch64-linux-release.sh
@@ -60,7 +60,6 @@ stage3-release/bin/zig build -Dtarget=arm-linux-musleabihf
 # TODO: add -fqemu back to this line
 
 stage3-release/bin/zig build test docs \
-  -j1 \
   -fwasmtime \
   -Dstatic-llvm \
   -Dtarget=native-native-musl \
diff --git a/ci/aarch64-macos.sh b/ci/aarch64-macos.sh
index 634a60b600..b4533e149f 100755
--- a/ci/aarch64-macos.sh
+++ b/ci/aarch64-macos.sh
@@ -44,7 +44,6 @@ PATH="$HOME/local/bin:$PATH" cmake .. \
 $HOME/local/bin/ninja install
 
 stage3-release/bin/zig build test docs \
-  -j1 \
   --zig-lib-dir "$(pwd)/../lib" \
   -Denable-macos-sdk \
   -Dstatic-llvm \
diff --git a/ci/x86_64-linux-debug.sh b/ci/x86_64-linux-debug.sh
index 1267a2d753..7f2382f04a 100755
--- a/ci/x86_64-linux-debug.sh
+++ b/ci/x86_64-linux-debug.sh
@@ -58,7 +58,6 @@ stage3-debug/bin/zig fmt --check .. \
 stage3-debug/bin/zig build -Dtarget=arm-linux-musleabihf
 
 stage3-debug/bin/zig build test docs \
-  -j1 \
   -fqemu \
   -fwasmtime \
   -Dstatic-llvm \
diff --git a/ci/x86_64-linux-release.sh b/ci/x86_64-linux-release.sh
index 3305f5e951..cdb24e4a6f 100755
--- a/ci/x86_64-linux-release.sh
+++ b/ci/x86_64-linux-release.sh
@@ -59,7 +59,6 @@ stage3-release/bin/zig fmt --check .. \
 stage3-release/bin/zig build -Dtarget=arm-linux-musleabihf
 
 stage3-release/bin/zig build test docs \
-  -j1 \
   -fqemu \
   -fwasmtime \
   -Dstatic-llvm \
diff --git a/ci/x86_64-macos-debug.sh b/ci/x86_64-macos-debug.sh
index edd35970b8..c24ff5d295 100755
--- a/ci/x86_64-macos-debug.sh
+++ b/ci/x86_64-macos-debug.sh
@@ -48,7 +48,6 @@ cmake .. \
 make $JOBS install
 
 stage3/bin/zig build test docs \
-  -j1 \
   --zig-lib-dir "$(pwd)/../lib" \
   -Denable-macos-sdk \
   -Dstatic-llvm \
diff --git a/ci/x86_64-macos-release.sh b/ci/x86_64-macos-release.sh
index 65dea3afcb..a4dedb4446 100755
--- a/ci/x86_64-macos-release.sh
+++ b/ci/x86_64-macos-release.sh
@@ -48,7 +48,6 @@ cmake .. \
 make $JOBS install
 
 stage3/bin/zig build test docs \
-  -j1 \
   --zig-lib-dir "$(pwd)/../lib" \
   -Denable-macos-sdk \
   -Dstatic-llvm \