diff --git a/src/broadcom/ci/broadcom-rpi4-fails.txt b/src/broadcom/ci/broadcom-rpi4-fails.txt
index 526bf752023..425fae3dc7b 100644
--- a/src/broadcom/ci/broadcom-rpi4-fails.txt
+++ b/src/broadcom/ci/broadcom-rpi4-fails.txt
@@ -205,7 +205,6 @@ spec@ext_packed_depth_stencil@texwrap formats offset,Fail
 spec@ext_packed_depth_stencil@texwrap formats offset@GL_DEPTH24_STENCIL8- NPOT,Fail
 spec@ext_packed_depth_stencil@texwrap formats,Fail
 spec@ext_packed_depth_stencil@texwrap formats@GL_DEPTH24_STENCIL8- NPOT,Fail
-spec@ext_packed_float@query-rgba-signed-components,Fail
 spec@ext_texture_integer@fbo-blending,Fail
 spec@ext_texture_integer@getteximage-clamping gl_arb_texture_rg,Fail
 spec@ext_texture_integer@getteximage-clamping,Fail
diff --git a/src/broadcom/ci/broadcom-rpi5-fails.txt b/src/broadcom/ci/broadcom-rpi5-fails.txt
index e3f654d4038..51f7086ad2b 100644
--- a/src/broadcom/ci/broadcom-rpi5-fails.txt
+++ b/src/broadcom/ci/broadcom-rpi5-fails.txt
@@ -191,7 +191,6 @@ spec@ext_packed_depth_stencil@texwrap formats offset,Fail
 spec@ext_packed_depth_stencil@texwrap formats offset@GL_DEPTH24_STENCIL8- NPOT,Fail
 spec@ext_packed_depth_stencil@texwrap formats,Fail
 spec@ext_packed_depth_stencil@texwrap formats@GL_DEPTH24_STENCIL8- NPOT,Fail
-spec@ext_packed_float@query-rgba-signed-components,Fail
 spec@ext_texture_integer@fbo-blending,Fail
 spec@ext_texture_integer@getteximage-clamping gl_arb_texture_rg,Fail
 spec@ext_texture_integer@getteximage-clamping,Fail
diff --git a/src/gallium/drivers/zink/ci/zink-anv-tgl-fails.txt b/src/gallium/drivers/zink/ci/zink-anv-tgl-fails.txt
index de414f40076..f49ad9f4fa8 100644
--- a/src/gallium/drivers/zink/ci/zink-anv-tgl-fails.txt
+++ b/src/gallium/drivers/zink/ci/zink-anv-tgl-fails.txt
@@ -548,8 +548,6 @@ spec@ext_framebuffer_multisample@interpolation 8 centroid-disabled,Fail
 spec@ext_framebuffer_multisample@interpolation 8 non-centroid-deriv-disabled,Fail
 spec@ext_framebuffer_multisample@interpolation 8 non-centroid-disabled,Fail
 
-spec@ext_packed_float@query-rgba-signed-components,Fail
-
 spec@ext_transform_feedback@tessellation triangle_fan flat_first,Fail
 spec@ext_transform_feedback@tessellation quad_strip wireframe,Fail
 spec@ext_transform_feedback@tessellation quads wireframe,Fail
diff --git a/src/gallium/drivers/zink/ci/zink-radv-vangogh-fails.txt b/src/gallium/drivers/zink/ci/zink-radv-vangogh-fails.txt
index c73917a75ec..8b803ab838e 100644
--- a/src/gallium/drivers/zink/ci/zink-radv-vangogh-fails.txt
+++ b/src/gallium/drivers/zink/ci/zink-radv-vangogh-fails.txt
@@ -31,8 +31,6 @@ spec@egl_chromium_sync_control@conformance@eglGetSyncValuesCHROMIUM_msc_and_sbc_
 spec@egl_khr_gl_image@egl_khr_gl_renderbuffer_image-clear-shared-image gl_depth_component24,Fail
 spec@egl_khr_surfaceless_context@viewport,Fail
 
-spec@ext_packed_float@query-rgba-signed-components,Fail
-
 spec@glsl-1.10@execution@glsl-fs-inline-explosion,Crash
 spec@glsl-1.10@execution@glsl-vs-inline-explosion,Crash
 spec@glsl-1.10@execution@loops@glsl-fs-unroll-explosion,Crash
diff --git a/src/mesa/main/get.c b/src/mesa/main/get.c
index fe6b6019aff..f7e72b24f63 100644
--- a/src/mesa/main/get.c
+++ b/src/mesa/main/get.c
@@ -1028,6 +1028,12 @@ find_custom_value(struct gl_context *ctx, const struct value_desc *d, union valu
             GLint i_bits =
                _mesa_get_format_bits(rb->Format, GL_TEXTURE_INTENSITY_SIZE);
 
+            /* Fix the case where some drivers may implement signed luminance
+             * as signed RGBA, which leads to reporting signed alpha.
+             */
+            if (rb->_BaseFormat == GL_LUMINANCE)
+               a_bits = 0;
+
             v->value_int_4[0] = r_bits + l_bits + i_bits > 0;
             v->value_int_4[1] = g_bits + l_bits + i_bits > 0;
             v->value_int_4[2] = b_bits + l_bits + i_bits > 0;
diff --git a/src/panfrost/ci/panfrost-g52-fails.txt b/src/panfrost/ci/panfrost-g52-fails.txt
index c1969827b29..22de1f2c293 100644
--- a/src/panfrost/ci/panfrost-g52-fails.txt
+++ b/src/panfrost/ci/panfrost-g52-fails.txt
@@ -102,7 +102,6 @@ spec@ext_framebuffer_object@fbo-blending-formats@GL_LUMINANCE,Fail
 spec@ext_framebuffer_object@fbo-blending-snorm,Fail
 spec@ext_framebuffer_object@getteximage-formats init-by-clear-and-render,Fail
 spec@ext_framebuffer_object@getteximage-formats init-by-rendering,Fail
-spec@ext_packed_float@query-rgba-signed-components,Fail
 spec@ext_transform_feedback2@draw-auto,Fail
 spec@ext_transform_feedback@builtin-varyings gl_clipdistance,Fail
 spec@ext_transform_feedback@change-size base-shrink,Fail
diff --git a/src/panfrost/ci/panfrost-g57-fails.txt b/src/panfrost/ci/panfrost-g57-fails.txt
index 41b1596f1ad..0c9b4f13435 100644
--- a/src/panfrost/ci/panfrost-g57-fails.txt
+++ b/src/panfrost/ci/panfrost-g57-fails.txt
@@ -173,7 +173,6 @@ spec@ext_image_dma_buf_import@ext_image_dma_buf_import-sample_yuyv,Fail
 spec@ext_image_dma_buf_import@ext_image_dma_buf_import-sample_yvu420,Fail
 spec@ext_image_dma_buf_import@ext_image_dma_buf_import-transcode-nv12-as-r8-gr88,Fail
 spec@ext_image_dma_buf_import@ext_image_dma_buf_import-unsupported_format,Fail
-spec@ext_packed_float@query-rgba-signed-components,Fail
 spec@ext_transform_feedback2@draw-auto,Fail
 spec@ext_transform_feedback@builtin-varyings gl_clipdistance,Fail
 spec@ext_transform_feedback@change-size base-shrink,Fail