diff --git a/kokoro/linux-gcc-debug-dawn/build.sh b/kokoro/linux-gcc-debug-dawn/build.sh
index 43598b34..7089debe 100755
--- a/kokoro/linux-gcc-debug-dawn/build.sh
+++ b/kokoro/linux-gcc-debug-dawn/build.sh
@@ -17,4 +17,4 @@ set -e  # fail on error
 set -x  # display commands
 
 SCRIPT_DIR=`dirname "$BASH_SOURCE"`
-source $SCRIPT_DIR/../scripts/linux/build_dawn.sh DEBUG "gcc-13"
+source $SCRIPT_DIR/../scripts/linux/build_dawn.sh DEBUG "gcc-15"
diff --git a/kokoro/linux-gcc-debug/build.sh b/kokoro/linux-gcc-debug/build.sh
index 5b5f1a4f..3d2bb4b3 100755
--- a/kokoro/linux-gcc-debug/build.sh
+++ b/kokoro/linux-gcc-debug/build.sh
@@ -17,5 +17,5 @@ set -e  # fail on error
 set -x  # display commands
 
 SCRIPT_DIR=`dirname "$BASH_SOURCE"`
-source $SCRIPT_DIR/../scripts/linux/build.sh DEBUG "gcc-13" \
+source $SCRIPT_DIR/../scripts/linux/build.sh DEBUG "gcc-15" \
     -DAMBER_ENABLE_SWIFTSHADER=TRUE
diff --git a/kokoro/linux-gcc-release-clspv/build.sh b/kokoro/linux-gcc-release-clspv/build.sh
index 1886573e..90944faf 100755
--- a/kokoro/linux-gcc-release-clspv/build.sh
+++ b/kokoro/linux-gcc-release-clspv/build.sh
@@ -17,6 +17,6 @@ set -e  # fail on error
 set -x  # display commands
 
 SCRIPT_DIR=`dirname "$BASH_SOURCE"`
-source $SCRIPT_DIR/../scripts/linux/build.sh RELEASE "gcc-13" \
+source $SCRIPT_DIR/../scripts/linux/build.sh RELEASE "gcc-15" \
     -DAMBER_USE_CLSPV=TRUE \
     -DAMBER_ENABLE_SWIFTSHADER=TRUE
diff --git a/kokoro/linux-gcc-release/build.sh b/kokoro/linux-gcc-release/build.sh
index 0632bcf0..4e899ab4 100755
--- a/kokoro/linux-gcc-release/build.sh
+++ b/kokoro/linux-gcc-release/build.sh
@@ -17,6 +17,6 @@ set -e  # fail on error
 set -x  # display commands
 
 SCRIPT_DIR=`dirname "$BASH_SOURCE"`
-source $SCRIPT_DIR/../scripts/linux/build.sh RELEASE "gcc-13" \
+source $SCRIPT_DIR/../scripts/linux/build.sh RELEASE "gcc-15" \
     -DAMBER_ENABLE_SWIFTSHADER=TRUE \
     -DAMBER_USE_DXC=TRUE